SEBASTIAN MICHAELIS x {}

♛

MOTHERLY: Sebastian realized it right from the start, long before you or Ciel. He wasn’t planning on saying anything about it either, just wanting to wait and see how it would play out. It was in the way Ciel looked at you, how you didn’t seem to be able to do anything wrong and how he never got upset with you, either to your face or whilst talking to the demon. Ciel never mentioned anything about seeing you as a mother figure to Sebastian; he didn’t really need to. The young master often gave small half-smiles when your name came up in conversation, a privilege he offered to few. You cared very much for Ciel, but it was quite clear to the demon that you hadn’t realized exactly how highly he thought of you. The earl even went so far as to ask you for advice regarding Elizabeth; he'd upset her and desperately needed to know how best to make it up to her. It was coming up for Valentine’s and he hadn’t got a clue what the right protocol was. You were, of course, more than happy to provide all of this information to the best of your ability, but you successfully missed the small quirk of Sebastian’s lips as Ciel payed remarkably close attention to your words, almost as much as he gave to Elizabeth herself. It was one evening when the demon had managed to get some time to be with you that he finally mentioned it. You were curled up together in a large armchair, Sebastian holding you on his lap as you played with the collar of his dress shirt, his fingertips running back through your hair. “Ciel seemed happy today,” you whispered, feeling the need to in the late night quiet which had enveloped the room. Sebastian’s mind flicked back when you had been gathering your things and preparing to leave the manner, only for the young master to decide he needed your opinion on a card for Elizabeth. Only when he called you, he had said ‘Mother.’ Mey-Rin, Finny and Bard all turned sharply as he said it, more than shocked. But a swiftly raised eyebrow and well aimed look from the butler efficiently stopped them from saying anything. Ciel seemed to feel it was a fairly normal thing to say — he’d given no indication that it was an accident — and you hadn’t so much as turned a hair. Sebastian suspected you hadn’t actually realized what had been said, or what it meant. The demon moved his hand to rest it gently against your cheek, prompting your gaze to meet his. You were slightly surprised to see a soft emotion lying there, something you couldn’t quite put a name to and something you certainly didn’t expect from him. A warm feeling filled your chest as you realized he was intentionally allowing himself to be slightly more vulnerable around you. Really, what you were seeing was a display of trust. “Did you realize,” Sebastian murmured quietly. “—exactly what the Young Master said?” You frowned, thinking through the conversation. All you remembered was him asking advice about the card and what you had suggested in response. You related as much to the demon, who just lightly shook his head. “He called you 'mother,' Sybil." Your eyes widened in shock as you ran through what happened one more time and realized that yes, that was exactly what the earl had said. Sebastian just offered a knowing smile. “I realized you hadn’t heard.” In his opinion, you looked like a deer caught in the headlights and it was positively adorable. “It wasn’t something I expected either,” he confessed at length, when you still failed to respond. Ciel really thought of you as a mother figure? You could see why he viewed you as someone who offered protection — you spent all of your time around the manor with Sebastian, and that was his main role — but he really cared that much about you? And he had to have incredible trust for you, as well. You eventually came up with “Wow...” much to the demon’s amusement. After some deliberation, you came to the conclusion that you were honored. Incredibly surprised, but absolutely honored. From then on, you ensured you would always be there for Ciel if he needed you, even if it was just a familiar face that he wanted, or someone to confide in or a person who could give him advice about Elizabeth, you would always be willing to help him.JUMPY AND TOUCH-STARVED: Alright, so Sebby has no clue what being touch-starved means and at first he just figured that she was just really jumpy. Before the relationship starts, he wouldn't tease her too much but on occasion would for being so jumpy, especially since he was interested in her. Eventually, when they did start a relationship, he teased her more. (Once Snake comes along, he started seeing parallels between how jumpy and touch-adverse they can both be. Sebby may be a bit slow when it comes to knowing that she's touch-starved at first, but make no mistake, he’s extremely observant.) Once he knows, he understands. So that's why she's so jumpy. He's going to have to change that. Goes slowly at first because he wants to ease her into it but he makes sure to give her a little more physical affection. Now that Sebastian knows that she's touch-starved and afraid to ask, he'll start to pick up on the subtle hints that she gives since she won't outright ask for affection. Thinks it cute that Sybil wants cuddles so much but is too shy to ask for them. But don't you worry — Sebby, while being very busy, will make time to cuddle her when he notices that she's in need of some physical affection. Although he'll try to get her out of her shell a little bit and ask for cuddles on occasion, he won't push Sybil too much.SEES SOULS: Sebastian is very much intrigued by this. As someone who can almost always tell whether a person is human, demon or otherwise because he’s a demon, the fact that you are a human yet can somehow only see souls is incredibly interesting to him. He might ask you every so often to describe the soul of a random person you see while you’re walking together, difficult though it is to explain, purely to see if you description matches up to what he sees. His interest simply grows when you describe a woman’s soul as soft and warm, like a glowing lamplight or a gentle voice. Those were perhaps the best words he’d ever heard be used to describe a human soul, and they were exactly the ones he would've chosen for this woman. He then asks about himself. Obviously you know he is a demon and he’s seen plenty enough of them to know what they are like on a spiritual level — they don’t have souls, per se, but what you’re seeing is the closest thing a demon can manage, perhaps the gaping hole where a soul used to be millennia ago. You describe him as dark and cold, the dangerous, spine-chilling kind that makes bile rise in the back of your throat before you’ve even realized you’re not alone. The demon can’t help but smile, though, because you’re at great pains to impress upon him that although this is what you see, the way he is with you couldn’t possibly be any more different and that this is in no way a reflection of your thoughts on him, of how you see him. He reassures you that he understands and that, again, this is exactly what he sees in other demons. He still can’t quite work out just how you ended up with this ability as opposed to ‘sight’ in the traditional sense, but that simply adds another layer of mystery to the whole affair and he can’t help but want to explore it more.WITTY: Your wit. Your sarcastic nature would be one of the most endearing things to Sebastian. Someone unimpressed with his outlandish actions, someone who rolls their eyes at his dramatic behavior. A person with a wit as sharp as a rapier. A person infamous for their clever remarks and backhanded compliments. Your sharp tongue and active mind would draw him to you like a moth to a flame, and your conversations would sound more like a fencing duel than polite banter. If you happened to find yourself on the wrong side of Earl Phantomhive's favor, he'd adore his subtle threats being returned with veiled threats of your own. An exasperated persona, someone unimpressed or maybe even mildly amused with his irritating smugness at being competent at everything. Overall, your sharp tongue and dry satire would be far more appealing than any part of your appearance.SARCASTIC: Sebastian thinks your jokes are absolutely hilarious. He might not always show it, maybe only smirking or quietly chuckling to himself (especially if Ciel is there) but he could positively scream with laughter most of the time. If you’re at home together, he holds back far less. It’s not unusual to watch him clasp a hand over his mouth and lean back against the nearest piece of furniture, eyes squeezed shut as he laughs. The thing is though, you don’t even have to be saying jokes to sound funny. Half of what you say is massively sarcastic anyway and Sebastian (being Sebastian) literally always picks up on it even when others aren’t clued in and think you’re being serious. This has gotten you into trouble more than once and when that happens, it really just makes the demon laugh more. He does eventually help you out, but not before he’s milked the moment for all it’s worth. In return, his comments to you tend to be spoken quietly, generally about the company you’re with whilst they are still standing with you. His goal is to make you forget yourself and laugh as he is fully capable of keeping a completely straight face regardless of what happens. You, not so much. That is a fact that both of you know, hence why the competition started. You try to do the same back to Sebastian, but his lips have never so much as twitched, even once. Often, he uses this as a way to say something even funnier back to you in an attempt to make you laugh. The demon also like watching your reactions in awkward or uncomfortable situations. It’s not that he wishes them on you, quite the opposite, he just takes far too much enjoyment in watching you struggle to diffuse whatever tension there is in the room. Eventually he’ll help you out with that too, but not before he’s let you flounder for at least a little while.Hello! how are you? I really like your blog! i req a hc for bassy edwy and grell to a very beautiful s /o who has long soft hair, with rare eyes (like purple eyes) and a very soft and pale skin, also who is very kind and attentive with them thank you!❤️❤️” Okay, so Sebastian absolutely loves your eyes. As a being with unusual eyes himself, he finds humans with unusually-colored eyes to be very interesting. In fact, he doesn’t think he’s ever met a human with purple eyes before, so of course he needs to know more about that. Is it your real eye color, not contacts? Yes? Then do you know how you got those gorgeous eyes of yours? Because he'd really like to know. This demon thinks your personality absolutely suits your looks. Gentle, caring, always wanting those you care about to be happy and well and working to ensure that, too. He loves the attention to detail you pay. For example, you know as soon as you see him if he’s had a stressful day, and generally you know how best to make him feel better. You seem able to tell if he wants to sit down somewhere comfortable and cuddle for ages, or if really he just wants to be in the quiet for a moment. He went to your place for the calming atmosphere it always manages to give. You yourself help reduce his stress to no end. He never fails to be amazed by how kind you can be, how thoughtful. And you don’t even do things in big flashy displays. It’s just a small smile here, conveying that if he wants to talk to you he can, or a gentle hand on his arm there, letting him know you’re here if he needs you. He especially loves how your eyes are different to other people’s and that you absolutely embrace it, you don’t try and hide or anything like that. If anyone gives you any schtick for being ‘weird’ or ‘different,’ Sebastian will introduce them to a fear they didn’t even think was possible and you can be absolutely certain they will never bother you again. Might even compliment how nice you look. That said, it would only happen while you weren’t present. You’re too kind to ever do anything like that and he would hate to upset you through you seeing him do it. One of his favorite things is to just gently run his hand back through your hair. It’s so soft and smooth and it smells so good. He doesn’t even know how you manage it, but it’s the most comforting thing to him. And the scent is so much stronger to him after he runs his hands through it, which really just prompts him to do it more. He also likes just pressing a kiss to your head and lingering there a moment, taking in the delightful smell of your shampoo. Something else he finds very relaxing.Sebastian admires how she's so laid-back and calm and just a go-with-the-flow kinda person. Y/N teaches him how to be gentle with humans and he adores how intently she listens to his stories of his many years of existence. Sebastian loves her. “My, my, you’re quite the sight in that dress, my lady.” “Oh? This? I made this out of the drapes in my room, but thank you, Sebastian.” He gets protective if anyone or anything tries any shit. When she tells him about how she views herself, his eyes flash and he pulls her to himself. “Someone is putting that vile rubbish in your head — Who? I demand to know.” He then kisses the top of her head.SINGING: Okay so Sebastian thinks your singing is the most beautiful sound he has ever heard. You’re so incredibly talented and he knows how much work it took to get where you are, so every time you get an offer to sing at a show, he’s positively delighted. The first time you rushed in to tell him someone had asked you to sing, he literally picked you up and twirled you around in the air, kissing you a few times for good measure in congratulations. He’s been to every last one of your shows. You’re at a loss for how he manages it with how many other things he has to do in his busy life, yet somehow he does. If it’s a production that goes on multiple times, he manages to procure a ticket for opening night. He accompanies you to the venue hours before any of your performances actually start so you can go through makeup, rehearsals and anything else you might need to do. If it’s an evening performance but you’ve been there practicing all day, he brings your favorite meal for lunch (whether that’s your favorite takeaway or something he’s whipped up at home and brought to you packaged up). He is not above sticking a whole meal in a thermos and bringing that to you as well. You never quite know how he does this either, but Sebastian is always there backstage when you finish your piece, after the encores and the applause has died down. He’s the first to congratulate you on an absolutely outstanding performance, the first to ask if there is anything he can do for you, anything you need. He praises you through the aftermath of the adrenalin high caused by being out on stage, if you get a little sad or deflated later on that night because this massive show that you’ve been building up to for weeks is now over, he’s there to comfort you through that too. Should something ever go wrong in one of your shows, however minor and especially if you are upset about it, he will absolutely be there to make you feel better. Even if it’s the middle of the show and you have to go back on stage in a minute but you’re so worried because you just messed something up, he appears like a vision. You’re in his arms before you know what’s happened and he’s reassuring you that it sounded absolutely perfect to him and nobody in the audience will have noticed a thing. Besides, there’s not a performer out there who hasn’t made a mistake on stage, it’s all about just getting back out there and acting like nothing happened. “The show must go on, my dear, and you are doing just wonderfully.” Sebastian himself is quite a good singer, albeit not a professional one, so if you ever need help with anything or want him to listen in on your practicing and give you some tips he’s more than happy to do so. He has quite the critical ear and he’s not afraid to voice his opinions though, so be prepared for constructive criticism aplenty. It’s only in the sense of trying to help you thought and help you be the best you can, he would never insult you or make you feel down about anything. Every so often, you two will spontaneously just start singing together. Maybe one of you is humming the tune to a song the other knows well so they start to sing it quietly, and before you know it, you have a beautiful duet going on. Anyone would think you were made to sing together. Sometimes, you end up incorporating a little dance into it as well. Sebastian’s dancing skills are amazing, particularly his classic ballroom dances, so if you would be willing to dance with him while you sing together he would truly love every second of it.

| Abuse

He knew of it the moment {Name} entered the Phantomhive manor; he keeps tabs on all of the servants. Was originally going to wait for her to bring it up. But she never did, so he decided to subtly do so. The look of shock when she just dismissed it as “It didn't happen that much" or “It wasn't that bad." Immediately sat her down and had a very, very, very long talk about how it shouldn't have happened at all and that it's extremely unhealthy to deny that such things happen. By the end of it, she's crying in Sebastian's arms and telling him everything even if she still tries to say it wasn't that bad. Remember when he stuck that one guy in the oven?? Yeah, that's tame compared to what he might do. If she insists he doesn't kill them, then their life's going to be living hell. If {Name} still has ties to them and the abuse continues? He won't let them within the same room as her unless he or another person is there. Every so often, he'll bring it up lightly to make sure she hasn't gone back to denying it even happened. When finding this out originally as he collected information on her, he didn't look into it, but once she become his s/o, he goes back and sifts through it. Is honestly appalled at the amount of gaslighting. The way they'd manipulate {Name} into thinking that what they were doing wasn't that bad or didn't happen often was disgusting to him. And if they hit her, too? He knows she can handle herself like all the servants but he still doesn't want to see a single bruise or cut on her body. {Name} having been previously abused doesn't change his views of her in the slightest; she's still a beautiful, capable, smart human and he loves her very dearly. Demons don't have emotions my ass. If the abuse is still continuing and he happens to see them hit her— no no no, TRY to hit her, he's stopping it in a second. He'll catch their hand and smile at them with that sickeningly polite smile before giving them one (1) warning and ONLY one (1). Sebastian will NOT have {Name} be struck in any way, shape, or form. Period. Sebastian cares a lot even if he doesn't show it all the time and he's willing to help her as long as he needs for her to come to terms with the abuse she suffered.

Self-Image: Sebastian can feel in his heart when {Name}'s sad or in pain, knowing she is, it hurts him. It's like being stabbed repeatedly without dying. He hates when she's feeling down and insecure. When she cries, he can hear her shaky breaths, he can hear all the awful words she whispers to herself. The things she says to herself, the self-degrading things she says, it's invisible to him. To Sebastian, she's more beautiful than a full moon in winter. “My darling {Name}, listen to me, okay? Hold your hands out." Once she put her hands out, open-palmed, he'll hold them. He likes to hold them because he knows it helps stop how much she's shaking. Her hands fit in his perfectly; he loves that they do. If she's still crying, he'll kiss her hands until she's calmed down a bit more. “What's bothering you, my dearest {Name}?" Sebastian would ask. He's always patient with her in times like these. He lets her take as long as she needs to answer. If she ever starts crying again, he'll embrace {Name} and hold her tight and very close to him. One hand will rest upon the small of her back and the other will be holding the back of her head, gently pressing it to his chest. When she's in this type of pain, the not-wanting-to-live type of pain. Sebastian gets really soft-hearted and lovey-dovey, yet he also gets very protective and worried for her damaged soul. Sometimes, when he reads some of {Name}'s thoughts, he may start to cry himself.
Insecurities: Sebastian also knew something was wrong immediately. {Name} smiled and kissed him lightly when she came in, but there was worry clearly radiating from her and the demon didn’t know why. He placed a gentle hand on her arm as she went to walk past him, drawing her somewhat reluctant gaze back to him. “Do you want to talk to me about it?” he spoke so softly, like he was trying not to scare her away. She didn’t answer right away, surprised he’d even realized so quickly but also unsure as to whether she really wanted all of this to come out right now. {Name} was already feeling overwhelmed today and the thought of explaining it all to Sebastian, of all people, was more than a little daunting. “{Name}? Your hand is trembling, are you alright?” She glanced over to see she'd rested her hand on Sebastian’s arm without realizing and quickly went to remove it. {Name} tried to tell him she was fine, but the demon merely said her name in a reproachful tone and turned her to face him, an eyebrow raised just to make sure she knew he didn’t believe a word she said. She sighed loudly, turning her head to the side once more. Sebastian's gaze was still boring into hers and it was clear she wouldn’t get away with saying nothing was wrong, so she quietly told him that she worried about how she looked, what other people thought of her, and all of it just ended up overwhelming her sometimes. The demon let out a soft breath, extending his arms to offer a hug that {Name} quickly accepted. She hid her face in his chest out of yet more worry over what he might say or think, over what was going to happen next. As it was, she just felt his hand start stroking over her head, closing her eyes when he craned his neck to press a kiss on her cheek. “Would you like tea, my love?” he asked, simply nodding when she said yes. He then startled a shock out of {Name} by scooping her up bridal-style and taking her into the other room where, by magic, there were two cups of steaming tea waiting on the coffee table. Sebastian then put her down on the sofa, sat close by, and wrapped an arm around her shoulders as she curled into his side. “Now, about these self-conscious concerns of yours,” he murmured, head tilted forwards and eyes seeming to have just the merest glint of red. “—they are entirely unnecessary.” He went on to tell {Name} that the people she feared were judging her were nothing but strangers and therefore utterly meaningless to her. Their opinions, voiced or not, were unwanted and as such should be ignored completely. That said, he reassured her, he doubted there were many people with negative thoughts about her anyway, in particular those who didn’t know her. As for her appearance? “{Name}, you are one of the most beautiful people I have ever seen in all the centuries I’ve been on this Earth. Please, don’t ever doubt that.” He took her hand then and lightly ran his thumb over the inside of her wrist, practically seeing the shivers pass up her spine at the sensation. He was smiling a little, though, silently reassuring that what he said was absolutely true.
Insomnia: Tsk tsk, when Sebastian finds out that {Name} struggles to sleep at night, he knows that he can’t have that. First he gets her better blankets and pillows in hopes that making her more comfortable. “What’s this, Sebastian?” “I ordered some new sheets from the best manufacturer in the country. I thought that would help you a little.” Sebastian also insists on her wearing a specific pairs of pajamas, made with silk from China. Before bed, Sebastian gives {Name} a massage to relax her. Just like that all the stress from the day seems to seep out of her. Oh, yes and warm tea's also prepared for her before she tucks in for the night. “Sebastian, this is all very lovely but shouldn’t you be getting some rest?” “I will once I’ve ensured that you’ve fallen asleep.” He'll stay up for as long as it takes. Sleep isn’t something that Sebastian really needs anyhow so he’s more than happy to remain at her side. If she requests for him to tell her a story, then he's more than happy to oblige. Cuddles are also something that he’ll provide if she needs it. Sebastian won’t waste a moment in wrapping his arms around her after she's asked. “Thank you, Sebastian, I think I’ll actually be able to rest tonight.” “Well, if I couldn’t help my darling go to sleep, what kind of man would I be?”
Nightmare: Everyone knows Sebastian’s senses are absolutely impeccable, so he'd be the type of guy to get the feeling she's having a bad dream and come check on her; he'd wake {Name} up whenever feeling the change in aura of her soul during a nightmare. Sebastian offers a warm drink, an embrace, and an ear to listen. He'd know that she was having a nightmare; he'd picked up on the change in her heart rate, the way her breathing rate sped up, the way her fingers clutched at air or the sheets as she tried to run away in her dream. He'd know and, bound to protect her, would find a way to get into her dream and wake her up slowly. Small things, like his voice saying “{Name}, you must wake up. You are having a nightmare” or “{Name}, this isn’t real.” When she woke, he'd be there with open arms, a handkerchief, listening ears, his eyes glowing in the darkness of her room. He'd cater to her every need — a light on, a walk around the manor to clear her head, a glass of warm milk, a snack, a cuddle… Whatever she needed, Sebastian can and will do it for her. He'd be tempted to let {Name} stew in her fear, to taint and blacken her soul, but he'd feel an odd compulsion not to and so he’d be the sweetest comfort for her. After all, the devil's always a perfect gentleman.

Quite the juxtaposition to Sebastian, which just makes him more intrigued about you in general. Someone well known for their purity has decided they want to be in a relationship with him? This human is far more interesting than so many others that he has encountered. You already knew there was truly something dark about him, to the point where you weren’t surprised when he told you he was a demon. This only served to make you even more of an enigma to Sebastian. Similarly, in a way at least, Sebastian can sense the purity of your soul. It’s tantalizing to him. White Rose is truly a fitting name to have been given by others and he suspects they don’t even realize just how fitting it is. You share the same mysterious grace as those flowers. Your unparalleled kindness is something else that fascinates him. His experience of humans in general is that they tend to be selfish and willing to trample anyone and anything to achieve their goals. You couldn’t be further from this and more importantly, none of it is an act. There is not a single time he can think of that you didn’t put others before yourself. You always seem to be there to give advice, offer a shoulder to cry on or just help with the smaller things. You insist on stopping if you can plainly see someone is lost and you give them directions to the best of your ability. Children seem to gravitate towards you if they have lost their people and you are more than happy to help them. Sebastian watches your interactions with others from a distance, smiling and shaking his head as he tries to comprehend how you could be so different to so many others. Your beauty is also something that catches people’s eyes, but especially when you’re with Sebastian. You two are like opposite sides of the same coin; day and night or chiaroscuro. They say that opposites attract and this really is the case for you too.

CRUSH

Criteria

| personality

UNDERSTANDING of his job's importance.
Genuinely good at heart. He’d also want someone to be able to be completely ACCEPTING of and cherish his true form. Sebastian loves being a demon, so someone who loved him like he loved himself would be absolutely necessary.
MATURE and can tell him when to tone it down. He finds immature people detestable and someone’s level of maturity makes or breaks his perception of them. Sebastian dislikes complaining or people who pity themselves; he finds it pathetic and it reminds him of how detestable the majority of humans are.
An INTELLIGENT partner is essential. As it is, Sebastian's a lot smarter than the majority of humans, reapers, and quite possibly other demons, so regardless of who he chooses as a partner, they need to be able to keep up with his mental abilities.
QUIET, but willing to voice their opinion if needed. A bit more low-maintenance and can relax in comfortable silence.
MYSTERIOUS. There's little he hasn't seen, so a tad of mystery's refreshing and a bit exciting to him. Someone with a unique perspective on the world would be desirable, as well — Sebastian finds humans incredibly perplexing, so a human that even other humans have difficulty deciphering would be attractive to him.
IS HARD TO GET (not playing hard to get). He wouldn’t want someone who’d come to him too easily though wouldn’t want to work terribly hard, either — he likes the chase, but only when he knows there’s a reward waiting for him at the end. He likes a challenge. Sebastian enjoys being put to the test and doesn’t care about winning so much as he cares about the actual game. Of course, all in all, he still hates losing a battle, be it physical skill set or witty ribbing. However, he does enjoy losing every once in a blue moon since it keeps him guessing.
Slightly tsundere, tough, tomboy-ish, and doesn't tolerate bullshit. Being FEISTY is another big turn-on for him. He loves sass, but only in the correct scenarios (I.e. only if you’re acting as his superior or equal). A bit rebellious, sexy. To add to that, if you’re acting as his inferior, he admires someone who respects him and does as he orders but at the same time isn't a kiss-ass. (That’s not to say he doesn't like it when people are in awe of him, either. Sebastian loves praise and human acceptance; it reminds him of how powerful he is and fuels his already-enormous ego, but he actually finds excessive adoration rather repulsive, y'know, Grell.)
PASSIONATE. At some point in the manga, Sebastian mentions that the brand of passion unique to humans is something that's very intriguing to him. Sebastian would also find perseverance attractive, especially if it was facing something they feared or a task that proved to be incredibly challenging. Sebastian would prefer someone who had a sense of adventure; he doesn’t care for boredom or laziness.
LIKES CATS
CUDDLY

| physical

Again, not one to care much for outer appearances, however he has a liking for “PROPER" figures of the era. (I think Yana said at one point that he dresses Ciel as what he thinks is appropriate / what he likes, and if Sebastian were taking care of a girl, she’d be in a corset everyday, which would most likely be tightened several times throughout the day. Basically, he likes proper things.) Masculine-wise, this means those with figures like Ciel or Vincent. Feminine-wise, this means a small waist and wider hips (plus a bigger chest, if possible).
Also one who has a slight attraction toward SLY FEATURES, although innocent features are quite attractive to him, as well.

He would likely value a partner who is competent and at least somewhat able to protect themselves and the young master.

Someone who could be easily and smoothly integrated into the staff force at the estate
Someone who could handle their own in work and life, allowing him the space to perform his own duties without interruption
Someone who could at the very least learn how to understand Ciel and keep him safe from human threats—be that through evacuation or actual self defence
Someone who would understand that he isn’t human and has a different way of expressing himself and his care for his s/o
And someone who could keep up with his heat cycles when they came

*Behavior

The only crush Sebastian has is the crUSHING WEIGHT OF HIS SINS and also his BRUTAL DEMONIC STRENGTH. LOL JK. In general, Sebastian's very in-tune with his interests. He’s able to notice what he likes, when he likes it, and for the most part, why he likes it. So, if there's someone that catches his fancy, it doesn’t go unnoticed. Since he’s a demon with very, hm, particular desires, he mostly (and usually correctly) interprets his attraction as something purely physical. Basically, he wants something out of the relationship. A sense of pride, physical satisfaction, the enjoyment of toying with someone so malleable and easily manipulated by his charm~ THAT SAID! Because he's a demon who's “so above the laughable emotional whims of humanity” (as he so smugly tells me), this boi is o b l i v i o u s to when he has real romantic interest in someone.
Oh, boy. Sebastian's honestly in disbelief when he sees a woman reading the morning newspaper about Jack the Ripper in public. Not to mention, she was annotating multiple things that he himself hadn't picked up on. He smiled at her when they made eye contact and asked why she was underlining and highlighting stuff. Y/N looked at him with a soft smile and told him that she was emphasizing inconsistences in the case. He asked if he could take a look and when he did, let's just say she was brought onto the case because Sebastian and Ciel both deemed her extremely intelligent.
A relationship begins either with her special kind of soul or with an exceptional kindness to a person. He'll be interested in her kindness after learning that she's not an angel. Humans know how to be very greedy and shitty creatures; Sebastian really doesn’t understand why Y/N's so kind. During that time on the case, where Y/N would regularly visit the Phantomhive Manor, she and Sebastian grew closer and closer. They both shared a love for anything dark / morbid. He'd also admire the fact that anytime Ciel would give Y/N papers to go over, she never got upset. In fact, a smile lit up on your face. When Sebastian asked her why she didn't get upset about having to read papers all day, she smiled and told him, “I don't see it as work, it's actually quite enjoyable and it also helps the case, so I don't mind."
It would take Sebastian a while to take a notice of his own feelings and how they changed around her. It would be much clearer to anyone around him, to be honest. There are always a lot of people observing Sebastian, especially when he's working. Mey-Rin, Finnian, and Baldroy at the Phantomhive mansion would take an immediate notice of how Sebastian's frown disappeared whenever Y/N came close or how his mood seemed to shift when he noticed her around. At first, they were startled. Maybe it was a coincidence. I mean, everybody liked her, so why would Sebastian be any different?
But the more they looked into it, the more obvious it was that Sebastian really enjoyed her presence. He often asked Y/N for help in the kitchen, obviously after he assigned the other servants some very time-consuming tasks at a faraway corner of the mansion. He didn't really need help — after all, what kind of butler would he be if he couldn't fulfill his master's will on his own? It was nice to have some company, though. Nicer than he originally thought. He may have slowed down finishing his tasks sometimes, just to finish a conversation with her or have those few more minutes. Even though he may not recognize the crush for a long, long time, Sebastian is and has always been the type to show off. Soooo~ he'd be flaunting himself often around his crush and would always be on top of her needs. Crush sneezes on the other side of the manor? He’s there in two seconds with a handkerchief and some immune-boosting tea, ready to gently chastise Y/N for not taking care of herself. Crush complains about the heat? Suddenly there’s a huge, magnificent ice sculpture waiting for her in the next room over.
Ok, whoa, whoa, whoa, wait a fuckin lil’ minute. Demon royalty??? Liking…. a human? Yikes. He acknowledges the fact that he holds a certain admiration for his human friend, but he thought it was just because she intrigued him and piqued his interest. It was one of those rare occasions where Ciel was working on paperwork and didn’t need him to do anything, and the servants were actually doing well, so he took Y/N out into the garden and set out a lil’ picnic (because mortals like those, right). He was just chilling under the shade with her and looked over as she rambled on about something she thought was beautiful, and her theories about the universe and reincarnation and stuff that a mere mortal should not really worry about. And he just thought that it was so amazing, the way somehow her eyes shone even in the shadow of the shade, and he absolutely adored that passionate gleam in her eye when she talked and he just... Fuck, he was so enraptured by Y/N, which is weird as hell because (1) He's 100% down for toying with / eating humans’ souls so WTF and (2) HE WASn’t eVEN supposED TO BE CORDIAL WITH otheR HUMANS, LET ALONE FALL FOR ONE. He freaks out, excuses himself, and goes to his master’s study, knocking. Once he’s got one foot in the door, he’s just like, “Young master, I think Y/N has made me ill and I’m not sure how to respond to the way my body is reacting.” And Ciel knows EXACTLY what’s up and is like “Dear Lord, get out of my office.”
Sebastian was rather reserved in his feelings for Y/N. He'd try to distance himself as much as possible but fails miserably in the end. However, he often gets overly protective and at times possessive, too, though the latter doesn’t occur as often because he’s full of himself and can’t conceive of anybody refusing him if he were to make a move. Sebastian's probably cleaning when he just happens to notice Y/N walk by and that’s when he started admiring her. Whenever she’s in the same room or doing something within his eyeshot, he’s staring. He isn't too bothered by anyone catching him; he knows it’s rude, but he’s just not really bothered when it comes down to Y/N. He wants her to know that he thinks she’s admirable. Sebastian also thinks it’s cute when she catches him staring, though, because she’s the one blushing and looking away; it’s sweet.

*Confession

When Sebastian asked her why she didn't get upset about having to read papers all day, she smiled and told him, “I don't see it as work, it's actually quite enjoyable and it also helps the case, so I don't mind." Honestly, that was the kicker that made Sebastian realize he'd fallen in love with you. So, one morning when he woke you up earlier than usual, you were a bit confused. He explained to you that he'd fallen for you. “Y/N, I have never experienced feelings like this, you make my heart feel like its racing anytime you smile. You make my face heat up anytime I hear you laugh. I truly believe I've fallen in love with you and I was wondering if you could reciprocate those feelings." You smiled at him and kissed him on the cheek; he turned beet red as he looked up at you. “I'm assuming that makes us official," he said with a smile.
Once he tells her about his feelings and the contract, he's so floored when she’s just like “Oh, so you’re a demon? That’s cool, do you wanna make some pound cake?”

PARTNER

Intimacy

| demon

species | Eventually, when they begin courting, he's still trying to figure her out. Yes, he automatically knows how to be a gentleman and the basics on how to court Y/N, but he never knew there'd be so many (emotional) strings attached. He tries to understand genuine love and happiness from their relationship together. She helps him understand the difference between love and lust. Since he’s a demon, he has no knowledge of how to be a proper significant other, so he'll have to learn to be the best, just like he did with being a butler. His general lack of knowledge in human emotions can make him quite insecure about his way of showing affection to her. He'll open up to her about his true feelings because there's mutual love and respect between the both of them. Trust's important in her relationship with him. He worries that Y/N wants a nice, human partner. No matter how much she asks, he refuses to talk about the supernatural and often changes the subject because he wants her to be safe and his only. Sebastian would respect her religion whatever it is (or so he wants her to believe; really, he has no intention of sharing her soul with God, an angel, or anyone else). He’s a cold-blooded monster who feasts on humans, but when he’s with Y/N, becomes the most charming person imaginable. He'll be very protective, caring, gentle, attentive, and careful to not scare or accidentally harm her.contract | Due to the contract he and Ciel have, the young lord can be seen as more of a priority; please don't take this to heart! He loves Y/N but due to the rules that are bound by the contract, he's obligated to carry out his master's orders immediately after they were given, especially if there was an emergency. However, if she also works in the Phantomhive household, there's a greater chance of them seeing each other more, as well, maybe getting into a conversation or two whilst on the job. Just like with Ciel, Sebastian would be very dedicated. If she needed anything, he'd do it with 110% satisfaction. He’ll do for her absolutely whatever is necessary but will have to be back for dinner. Y/N will have this demon’s entire heart and he'll undoubtedly protect her with his life and, since he's deemed her value to be so great that he'd actually establish a normal relationship with her, choose to protect her over Ciel. Just note that Sebastian loves her more than anything he's ever loved and is 100% going to make sure that even after his contract ends, Y/N and himself are well provided for and taken care of. <3history | Since his head is full of historical stories and legends in which he participated personally; he'll gladly tell Y/N some of them. The only thing she has to do is ask him about that. However, don’t expect to know which role he was playing in those stories, he probably won’t share this kind of information because he doesn’t want her to hate him because of his previous behavior and choices.immortality | Sebastian would be a very caring boyfriend. He's finally found a good partner for himself and is really going to take care of Y/N's every need. He'd do anything for her. Involving life and death kind. She's his entire world in his immortal life. Sebastian visibly breaks down when she passes away (or the contract duration is finished). He also constantly thinks of their memories together. To him, there will be no other like her in his life. She carved a very special and memorable place in his heart. Sebastian's a very overprotective, calm, and loving boyfriend who cares deeply for her. ♥promises to find him if she's reincarnated | Sebastian would find it so endearing. It would warm his heart that Y/N felt that way about him and he wouldn’t hesitate to let her know that. Her confession would most likely end in a cuddle session, as Sebastian would just want to gush and show how much she meant to him. He’d refuse to let her go until he felt that she understood how truly grateful he was to have her.*wings | Sebastian considers his demon form to be disgusting, frightening, and horrible. His wings are a fraction of said form, so of course he’s gonna give {Name} a polite “No” the first time she asks him to let her see them. Lavish him all she wants, he won’t budge. He’ll insist she’ll just end up scared of him or at the very least grossed-out; he says the sight of feathers and wings sprouting from his back isn’t a pretty one. So she's going to have to work her way around it. He’ll probably agree to show them to her if in exchange she offers to do something else (when said thing is done, he'll make one last attempt of slipping out of the deal). “Fine then, but don’t say I didn’t warn you, {Name}, I’m not responsible for whatever harm your silly ideas may inflict on you.” (He doesn’t really mean that, though, he’s addicted to having someone to care for and fuss over.) He’ll lock her out of his room. He doesn’t trust {Name} to not open the door and peek in the middle of his semi-transformation. The lock clicks, and she hears a muffled voice asking her to step in. There’s definitely a change in the air, something akin to fear pools in her stomach, but she holds it back as she closes and locks the door behind herself. This is Sebastian. Her Sebastian and her mate. He wouldn’t harm her for anything in the world. Sitting on the edge of the bed, back facing her, is her lover. She holds a gasp. “I told you, they’re not pretty, {Name}, are you happy now?” Sebastian says. “Why would you hide something like this from me?” she asks. Sebastian’s wings are coal black, so black, they seem to suck up the dim light from the candles. The dark limbs frame beautifully the demon’s chiseled back, accenting only further his pale broad shoulders; he’s the very image of temptation and desire at this very moment that she can’t help but picture a scenario in her head of him fucking her in this form. Sebastian flinches when her hand comes into contact with his wings. {Name} feels him tense up for a moment, but she's too lost contemplating his hellish beauty to say anything. It’s a total of four wings. A pair of large, very large ones right below his shoulders and a second, smaller pair starting right where the others end. All the while, Sebastian's as quiet as stone; he doesn’t say anything, but he doesn’t stop her either. She buries her hands right where the wings join his back; the feathers are soft, velvety and warm. {Name} smiles at the sensation and can’t help but hold him like this from behind and rest her face against the black softness, his bare skin radiating heat under her palms. “You like them?” he asks, fingers caressing her hands gently. She hums in response, releasing him from her embrace and taking her time to touch and explore every single inch of the black wings. He lets out a giggle when her fingers rub a sensitive area of his underwing. He’s ticklish, {Name} realizes. Gradually, Sebastian lowers his guard and leans into her caresses, groaning and letting out little noises to show how comfortable he is. His wings also relax, spreading open. Knowing that she's probably never getting to seeing his wings again, she asks him about the second, smaller pair. “They’re really cute, Seb, why are they so small?” He chuckles, “They’re growing, {Name}. They don’t look like much right now, but in about a couple centuries, they’ll be as big as the others. A fully mature demon grows up to four pairs of wings.” “Wait, so you’re something like… a baby demon?!” she asks, making Sebastian blush and smile. “Not exactly a baby, {Name}, more like… a young adult,” he says. Sebastian lets her play with the wings for as long as she likes; it’s become a very intimate moment both of them want to make last forever, but all the touching and caressing inevitably gets him in the mood for some intimacy between them. After all, he’s not wearing a shirt and she's openly caressing bare flesh. He starts by sneaking kisses and then pulling {Name} into his lap for a warm hug; she can feel his wings wrapping round her, as well, black feathers tickling her skin. It’s a good feeling, like being embraced double? She places a warm kiss on his lips, a gesture he returns with much enthusiasm, leaving her pressed against his bed with his body over hers, black wings tickling her sides and face. Of course, all this affection leads exactly where she wanted it to go. ( ͡° ͜ʖ ͡°) After this incident, Sebastian's slightly more open to showing more of himself to {Name}. He can’t deny he likes feeling her fingers comb through his black feathers, not to mention the happy and thrilled expression on her face each time she gets to pet his wings.]*true form | That's not only bold of {Name} to admit, it's shocking to hear. Dearest please, she's only seen a portion of him due to the way he makes her look away from this otherworldly form of his, yet with that alone she can deduce she isn't bothered by how he might look? For obvious reasons, Sebastian's skeptical, beyond pleased at the mere idea of her wanting to love him as he truly is yet the fact that she's never witnessed anything like him always comes to mind, ensuring that he keeps her health — both mental and physical — in mind before taking her words to heart. Sebastian as a person alone is beyond her comprehension, centuries of contracts and supernatural interactions that he can't describe without her loving view on him changing completely, naturally he's wary not to step over any boundary in concern of her human look on the world. He may be vocally against the idea of showing {Name} all of him, but God, do the words she speak affect him so. It's a pleasure for her to put so much trust in him, knowing Sebastian's more than the monster that he presents himself to be. Be patient and persistent, dear kitten; sooner or later, Sebastian will strip parts of his human flesh to reveal the void that takes shape of the part of his body the was torn off, smoke-like substance radiating off of him as she gets used to how heavy the air can become just from a partial exposer of his true being, yet nevertheless she asks if she can place a kiss upon the truest part of him, and of course who's he to stop his lover from showing her unconditional affections? The first step will quickly lead to Sebastian showing {Name} everything of him, greediness demanding more love expressed against the strange flesh of a demon he has, to feel her against him and wrap his ever-changing form around her in a showing of possession, dearest please, give him every bit of love she can possibly spare. He’s very worried of scaring her off. If she was ever curious about his true form, Sebastian would become very nervous. “How come I've never seen your true form before? I mean, we've been together long enough, haven't we?" “I don't want to show you in case it scares you off. I don't want to lose you, you know, darling?" He may show her eventually but as mentioned, he'd be too scared because he thinks that she'd run away and see him as the true monster that everybody else thinks he is. If {Name} gives him enough time, then maybe. However, if she does see his true form, please, don't run away — give him words that would boost his confidence. Sebastian shows her his true form, thinking that her feelings toward him will change for the worst and is surprised when she says that she loves him nonetheless.

| smile

Sebastian would adore her smile. It made his heart melt every time Y/N gave that signature grin of hers, so to see it, he'd do something that's very Sebastian-like in humor. Go figure. Most likely, it would be something similar to the “I’m simply one hell of a deer” incident. On an average day, it wouldn’t be anything over the top, instead something rather small. He wasn’t usually over the top with his emotions anyway; it would be enough to make Y/N smile. On the off chance that Sebastian was feeling a bit extravagant that day, he might go big and make her some huge ice sculpture, or food art, or something of that nature.

| Flustered

Sebastian? Blush? Pffft, never. Okay, maybe sometimes. When she compliments his work or praises him, he struggles to hide the heat rising on his cheeks. Or sometimes when {Name} initiates any sort of affection like cuddles or hugs. His cheeks dust pink when he sees her playing with cats. He definitely cannot handle two of Earth's most beautiful creatures at once. When {Name} does or says something reminding him that she cares for a monster like him, he'll absolutely turn red because he's not used to being taken care of.

| Insecurities

To be perfectly honest, I’ve never thought about those two connected aspects before and I had to take a while to comprehend them into one, reasonable answer since, obviously, they seem to create a paradox which is hard to reconcile. Undoubtedly, Sebastian is narcissistic and has a tendency to underestimate his enemies for he considers himself above almost everyone else which can be absolutely natural, taking in consideration his immortality and longevity, nonetheless it’s also the reason why he seems to be easier to fool than other characters. He even said it himself in chapter 114 while apologizing to Ciel for his ‘incredible negligence’ and admitting that he ‘failed to take this situation seriously because he assumed he would be able to sense immediately if Ciel had been harmed or wounded’. It’s good to know that he is able to notice this flaw of his from time to time but either way, I still consider him as a rather easy aim and I worry that he can once get fatally hurt because of that. Personally, I think that Sebastian’s jealousy doesn’t have much to do with him being too conceited nor - of course - having too low self esteem. The source of this feeling could lay in his acknowledgement of his true nature, of being a demon. Sebastian, aware of his superiority among humans never forgets about who he is and he tends to remind the others about it when they forget about it, nevertheless, when it comes to relationship, I think he may actually consider it as something not necessarily good. He knows that he is a demon, that he is evil and as much as he loves himself, he is not blind to not notice how harmful it can be for his partner - unless if they would be dating another human who wouldn’t have a hidden, starving beast hidden inside instead of a soul. I suppose it makes him angry. Sometimes it makes him furious that his true nature, in all its greatness he adores and accepts, could be the reason why he couldn’t be with someone he is fond of. Obviously, his partner would have to learn about it one day and I bet Sebastian can’t get rid of the suspicion that exactly this will be the main reason why they will leave him sooner or later and even if they don’t do it willingly, they will eventually die - because his true nature won’t allow him to experience love to the grave. One way or another, he is trying to keep his beloved one close for as long as possible and so every person who could take his place because they aren’t what he is, need to be pushed away before it’s too late. Sebastian’s jealousy could be an act of desperation and being aware of his own self, in all its monstrosity he is trying to hide behind the mask of a perfect man.

| Comfort

Your eyes are stinging from tears that refuse to stop. Your hands clench the collar of Sebastian's coat, crumpling the neatly ironed tailcoat slightly. Sebastian sits their in silence, unsure of how to comfort you. He could fake human emotions, but never really understood them. Maybe it was because he so deeply believed in the notion that demons do not feel, that he forgot that every creature that walked earth was cursed with emotions, no matter how less. His hand never left your back, continuing to rub circles on it to calm you down. He did not once mind your tears dampening his clothes, his focus remained on you and only you. Anger fueled within his chest, bloodshed was guaranteed for the one who had dared to hurt his dear lover. Sebastian would not spare their pitiful lives.

| Health

He makes sure {Name} takes care of herself and her well-being. “Do you want anything, kitten? Maybe tea or food? Are you tired? Do you need a massage?” He'll cook for her and make sure that she's always healthy. Sebastian would go out of his way to please her. He knows he's a great cook, even though he doesn't have any need for human food, and would gladly spoil her with sweets. All while declining them to Ciel, because of course kids shouldn't consume so many sweets, it's unhealthy, right? 😈He will always care for your health in the first place. Whether is it about taking medicines, drinking alcohol, smoking or going to any dangerous places and meeting an inappriopriate people, he will protect you and keep you out of this, even if it means making you angry at him. Humans are such a fragile creatures after all, and he can’t stand the possibility of losing you because of such a trivial reason.

*PERIOD: Sebastian would probably know his s/o’s cycle better than they did, honestly. So, as soon as they started becoming a bit moody, he would be by his partner’s side with anything they could ever need or want. He would attend to their every need, and would know just how to make their cramps bearable. Although, they may have almost forgotten about them altogether–I mean, they did have their own personal Sebastian Michaelis that was giving them his undivided attention. He wouldn’t even blink an eye whenever his partner snapped at him, he would just apologize for whatever it was, kiss them, and see if there was anything else they needed.
*ALLERGIES: He wouldn't know what 'allergies' were at first. He knows enough about humans, where the vital organs are and such (and of course that headshots are especially effective (and look cooler)). Once he realized eating certain usually edible foods could be harmful, he would put you on a strict ban of anything you were allergic to. He would adjust his sense of taste more and more to try to replicate recipes that had received good reviews without whatever ingredient(s) you were allergic to, (and succeed amazingly as usual). He would make sure to study up on allergies and ask you about the severity of your allergies. (After about an hour he knows more than the average doctor, probably because he went to the most prestigious medical school libraries just to make sure his findings were reliable).
*SICKNESS: He could tell by the change in {Name}'s scent that she was getting sick. She was human, after all, so sickness was common. Ciel was understanding enough to let her take some days off work so she could rest and get better. Besides, he knew if he didn't let her do that, he'd greatly annoy the demon butler. Sebastian always makes time for her, especially when she's sick. So expect plenty of care from him. Prepares a nice warm bed for her, with lots of fluffy pillows and warm cozy blankets. “Is there anything I could get for you?" “Oh dear, you have a fever. Let me see what I can fix up to help with that." When he isn't busy with Ciel, he's in the kitchen making {Name} soup and her favorite tea. Sebastian makes it because he doesn't trust Baldroy in the kitchen in general, much less with her food. Keeps the servants in check, so their antics don't wake {Name} from her sleep. He's extra gentle with her when she's sick; he doesn't want to hurt her or anything. Since Sebastian can't fall ill, he can still be around {Name} and not have to worry about getting Ciel sick. So win-win. Frequently comes in to check on her and make sure she's alright. It pains him greatly to see her in pain, which is why he's constantly asking if she's alright and if there's anything at all he can do for her. He makes sure she doesn't leave bed until she's healthy again. Sebastian also makes sure {Name} takes her medicine and eats / drinks. “Yes, the young master is in a bit of a bad mood today. I wish you could see it; it is quite amusing."
*LOSS: Through the centuries, Sebastian learned about the impact a death of the closest one can have upon people. Unfamiliar with the grief himself, he could only observe and wonder how must it feel to experience such a thing. It was unbelievable for him, the lack of compassion toward humans making it impossible to wholly empathize during such times — that is, until he met {Name}. She quickly grew such an important part of his life that he couldn't imagine it without her anymore. So precious and dear to him, he wanted to protect her from every bad thing that could possibly happen. And to be honest, there was plenty of them, various accidents and people with bad intentions could be seen behind every corner. He vowed to keep an eye on {Name} at all times, making sure that she was safe by his side. However, there were things he couldn't prevent. The ghosts of the past and emotions he didn't really understand. Sebastian could only watch them devour her and for the first time since he could remember, felt the pity squeeze his stomach, followed by the growing upset. He could fight every single one of her enemies, he could beat those who did her wrong, he could even kill them, he was capable of getting her out of even the most dangerous situations — but this? How could he fight the foe he couldn't see, nor touch, nor feel? One could call it heartbreaking and if Sebastian was ever close to experiencing this kind of emotions, seeing {Name} in this state was definitely the moment. He felt helpless and hopeless and, surprisingly, useless. But it didn't mean that he was going to simply sit and stare, no! He might not be the greatest support in this situation but he's still willing to do his best to help her get through it. The only thing which never changes is that everything eventually changes, after all, and so had her mood. He wouldn’t insist on her getting out of bed at first, allowing her to rest and taking care of all her duties. He'd do all of it with a reassuring smile on the lips to show {Name} that it's no bother for him and he actually likes being busy. She, on the other hand, should rest and take a break from the real world. Perhaps she'd like to watch a movie? Read a book? Play a game? Does she want to talk or prefer to be left alone? He'd act accordingly. After some time (a few days or a week, depending on her mood), Sebastian would eventually insist on her getting out of bed and doing something. Anything. He'd help her pick the outfit and offer to help her get dressed if needed, explaining that the appearance is an important aspect of living and once she looks good, she'll start feeling better. Get up, put clothes on, do her hair and / or make-up, for he’s taking her out on a date. And boi, will he spend a lot of time on looking for a perfect place... Sebastian wouldn’t take {Name} just to some fancy restaurant, not at first, at least. He'd decide to either go to the aquarium, amusement park, cinema, or zoo. He might also offer to take her for a journey to Hawai'i. It would be important to keep her busy and to show her that no matter what she feels inside, the world's still wonderful out there, waiting for her and inviting. As harsh as it sounds, life still goes on and he wouldn’t want {Name} to stay left behind due to the grief. Moreover, he'd want to make her feel more involved, asking about some things he was still not familiar with or didn't understand, bringing her focus to him of course and reminding her that she's important and needed here. He adored {Name} so much, he couldn't bear the thought of her being sad for too long. He'd do everything in his will to make her wishes come true, however ridiculous they might be. She was his spark of light and he was going to make sure that she shines brightly for as long as possible, safe in his hands.

| celebrations

anniversary | How Sebastian would celebrate would largely depend on the type of person she is. Everything would be planned probably months in advance because his daily body clock is amazing, but his general concept of time is pretty abysmal, to be honest. If she's the type to appreciate a party, then he’d throw a ball and invite almost everyone in Ciel’s address book. If she prefers a night in, he’d still throw a ball, but only invite close friends and immediate family. If she prefers one or the other but not fussed, or liked both, he’d likely throw a ball during the day and then have a private dinner and an evening spent with her. The private evening is spent in a different wing to the one Ciel sleeps in. ;) He’d gift Y/N extravagant gifts, but also special, meaningful ones. He’d cook her favorite foods and give her all her favorite snacks throughout the day. She’d wake up to a bouquet of roses from his personal garden and breakfast in bed. He’d cuddle Y/N, hug her — throughout the day, he’s touching her in some way. It’s possessive, but he’s a demon and it’s the way he is. She’d go to sleep, knowing just how loved and treasured she is.christmas | He’s still a bit new to the whole idea of celebrating it. Like, he’s got all of the decorations and he knows the food that everyone eats at this time of year, but he doesn’t exactly get it. Therefore, Y/N takes it upon herself to change that. They spend a whole night watching Christmas films together. Even her demon can’t help but smile at the overwhelming happiness of it all, though what makes him smile more is the fact that she falls asleep in the early hours of the morning, head on his chest. To her surprise, it turned out he carried on watching the films even though she wasn’t awake. The concept of gift-giving would be quite foreign to Sebastian, so when Y/N does give him a gift, he wouldn’t quite know how to react. He’d actually really appreciate the fact that she'd put in the time and effort to try and find him a gift, knowing that it would've been no easy task. He’d be one of those people who doesn’t tear open the gifts and instead takes time in opening it in order to treasure every part of the present. Sebastian loves the fact that she got him a kitten as a gift. His eyes lit up like Christmas. He's also one of the best cooks. Like, whether he’s actually cooking the food or if he’s using demonic powers, her Christmas dinner's literally going to be the best thing she's ever tasted. If it turns out she doesn’t like one of the traditional staples of the Christmas dinner, he'll flat-out just not cook it. If she has some strange addition to it that’s been passed down through her family for generations, that’ll be in there, too, and he’ll have managed to do it perfectly.

*HER BIRTHDAY: This will depend on how she wants to celebrate. If she didn’t want a fuss, then it’ll be a quiet “Good morning, my lady” and a small cake he made for her. Then a candle-lit bath with rose petals he drew for her, then a massage and maybe more. *wink wink nudge nudge* If she does want to make a fuss, then he’ll pull out all the stops; a proper ball, an ice sculpture of her likeness, cake, probably plant her favorite flowers or trees in the garden… Then he’ll show her how much he loves her in the evening… He believes in showing his love for {Name} every day of the year. But on her birthday, the day that brought her closer to him, is cause for extra celebration. He’d get {Name} a very meaningful gift and he’d know that she’ll love it before he’s even given it to her. Sebastian agonized over her gift until Ciel ordered him to choose one. She’d go to sleep in his arms, beaming.
*VALENTINE'S DAY: Usually, he wouldn’t really care. It’s just another day and he doesn’t really get why humans designate one day to show their love for somebody. Aren’t you supposed to show that everyday? For {Name}, though, he'd determine the course of the day based on really what she'd prefer. Don’t really celebrate it? Then he’d just be a little more affectionate than usual with smaller gestures; waking her up a little later than usual, making her favorite breakfast, spending more time with her that day. If she did celebrate it, he’d go all out. If he could, Sebastian would get the day off and spend it all with {Name}. Depending on her preferences, the day would go differently. But being Sebastian, he’d plan them the best Valentine’s Day ever. To be blunt, if she wasn’t sure she loved him by that point, she would be the end of the day. If she got Sebastian anything, he'd be very surprised. He’s used to treating others, not really receiving things. If he didn’t like it, his “Thank you” would be similar to when Elizabeth gave him the pink bonnet; a little bow and that’s it. If he did, then {Name} should expect a kiss or something in return. Especially if it was cat-related, or even just getting him a cat without Ciel noticing somehow. Clichés are absolutely the way to go for this demon. He's going to invite {Name} out to a lovely dinner in an expensive restaurant in the middle of London, a place filled with top hats and tailcoats. Sebastian himself will be wearing his finest, of course, a pressed black suit with his own tailored hat. He'd like to choose something for her to wear, as well, if she'll let him, something in a color that suits her yet makes her stand out and that he knows she'll feel comfortable wearing. It's quite late when they leave for the restaurant in all their finery, arriving via cab and being shown to their reserved seats, the best in the house in her opinion, immediately. Dinner's an ornate, candlelit affair, with Sebastian encouraging her to have whatever she likes — no expense is too much for his darling on such a special day. After dinner, when they get home, there are more candles and rose petals adorning every available surface, another beautiful bouquet of flowers (he already gave her one that morning) and her favorite sweet food is on the table. Overall, she should expect to be blown out of the water for Valentine’s Day. No matter how many years in a row, it’ll be amazing and he’ll make sure of it.

Possessiveness

| Protective

Sebastian would always be there as a voice of support when she needs it. Someone's said some awful shit to her? He'd hunt the fucker down and give them a slow, painful death. Even if Y/N didn't want them to die just because of a stupid comment they made over her appearance, there's no possible way she could prevent Sebastian from killing or beating the absolute shit out of them. Basically, he's very protective of her and even if somebody looks at Y/N the wrong way, he'll give them the exact same treatment. He instantly makes plans to kill whoever disrespects or hurts her. Sebastian’s a total worrywart. He'll go out of his way to stay by her side. Sebastian would probably be as protective of her as he is of Ciel, always making sure that Y/N's out of harm’s way and killing anyone who poses a threat. Whether it be another demon, shinigami, angel, or regular human. She's no longer allowed to walk outside late. Sebastian, if anyone, knows how dangerous people outdoors move in the dark. The definition of overprotective. He might act like a parent sometimes; “You want to go out to a party with your friends? Be home at ten PM sharp. Or better, let me come with you!” etc.

| Jealous

He may get jealous easily but can also quickly determine whether the object causing him to feel this is worth his time or not. Obviously, mostly they aren’t, so he can deal with them without Sybil even knowing about it all; showing her some affection in public to make sure that everyone knows she's currently in relationship with him. And when it comes to him, not many are willing to even try fighting for her since they usually know that with such a charming man, they may not stand a chance, so it's better to give up before he'll humiliate them in front of her. This tactic's simple and safe for everyone; however, the problems will start when he recognizes them as a rival. His jealousy won’t affect her most of the time, but if he wants to let her know that there's this kind of issue in their relationship, will surely show her; not in a particular straightforward way, but enough for her to understand. He'll often tell Sybil how glad he is to have her, how much he values her presence in his life, and how much better it became since she appeared — he won’t want to make her feel uneasy with this; he'll just want to make sure that she's aware of that. He'll just do his best to communicate to Sybil that he really likes her. It won’t change the fact that he'll want to push his rival away from her before they even have a chance to fall for her more. He may arrange an unexpected eviction for them from their home, make a really good opportunity for them to travel out of the city to visit their (dead) ill relative, or try to bring some business problems to them so they'll be occupied by solving them for few nights straight until they won’t be able to think about her anymore. If it doesn’t succeed, Sebastian will face them in a kind, gentlemanly manner. He may accidentally meet them on the street or a post office and will invite them for a small talk or even a coffee if he feels in the mood for having some fun. He'll ask them about their well-being and will introduce himself as her lover later, when he gains enough of their trust to be considered a good conversation partner. Then he'll gracefully switch between the subjects to ask about their family and friends, especially the one who lately had a really unpleasant accident in a carriage and had to attend to the hospital because of it; he'll ask if they're fine now and if his rival's sure that such a terrible thing wouldn’t happen to them ever again since damaged wheels aren't that uncommon a reason for traffic accidents. If asked how he knew what was the real cause of their injury, he'll only smile very politely and with a deep, fake empathy, not speak a word more. This will be the last warning he'll kindly give and no one should ever cross this line if they want to live and have their closest ones unharmed, too. The next, more radical step he may take will include personally showing his opponent what kind of evil forces he's trying to play with.Sebastian’s jealousy won’t really affect his way of having sex with Sybil since, if allowed, he can be rather rough every time. In such a situation, however, he'll shower her with even more physical affection than before, wanting to make sure that there's literally no being which could bring her better pleasure than him. He'll be willing to go for more than three or four rounds, even if it means pleasuring her only and watching her become a complete (but really satisfied) mess under him. He'll drink delighted moans and whimpers from her lips, caress every inch of her body with his skilled fingers, and eat her out so good she didn’t know it was even possible. Is Socorro willing to find out how many times in a row can she cum? Because he is and will certainly want to try it out.

Sebastian is a generally possessive and protective partner—both natural consequences of his being a demon and his view of humans, such as yourself, as being significantly more delicate and fragile than himself. This would come out in an array of positive and negative ways that would impact your relationship:

Not letting you go out alone (whether he or someone he trusts accompanies you or if he keeps an eye on you from a distance)
Linking arms when you’re walking in public
Placing his hand on the small of you back or wrapping an arm around your waist if he feels someone is getting too close
Carrying more of your workload to ensure you don’t overwork yourself
Keeping a close eye on your health and all but forcing you to rest and recoup whilst he performs your duties
Marking you during sex
and so on.

Sebastian also strikes me as being a jealous partner—which would be at the root of most of your arguments.

That gentleman was standing too close
You were talking to them for too long
You had no reason to entertain that guest when they were so clearly waiting for an opening to take you
He always has an excuse to scold you for lengthy interactions with humans he doesn’t trust—which lead into arguments
During these arguments, Sebastian is unbearably levelheaded—never even raising his voice or lifting his gaze away from whatever it was he was doing to acknowledge your upset
It’s his main flaw as he doesn’t exactly empathise with your emotions and stress, as being possessive and jealous are natural aspects of his species. It’s just natural for him, so all he’s able to do his try to calm you down and scold you for raising your voice and losing your temper with him
Though, as he is a demon, he’s talented when it comes to conflict deescalation with humans—and excellent at make-up sex on the occasion when that fails with you
So, in the end, you always stay together
he won’t let you go so easily

Quality Time

| butler

Sebastian’s time is usually occupied by the young master’s tasks, so there isn’t much to be spent with Y/N. Even so, he always has a way of making time by rearranging his schedule and even assigning more chores for the other servants. Most of his time spent with his lover will be at night, after the young master has fallen asleep, or in the morning, while they get ready for the day. Sebastian has to find a perfect balance of being a good significant other and a butler. (He'd find it much easier for her to stay within the walls of the Phantomhive Manor, so he persuades Ciel into letting her stay.)

| dates

He actually shows a lot of affection and love around Y/N. He's VERY romantic. My guy over here will take her out on the finest dates she's ever been on. He takes her out as often as possible to calm or quiet places, even just at home. Whichever she prefers.

| shopping

It's exciting, as he gets to know more about her personality, what she's into, and what her interests are.

| show-off

Sebastian will show off for Y/N when engaged in some sort of fight with an enemy. Like, yes, we understand that you’re immortal, but could you be a little more careful??

Although he will accept your basic human needs and respect them, sometimes he may want you to spent whole night with him so he could show you how beautiful night may be and – in spite of what people say – how alive it is, not less than the daytime. In return, you may convince him to actually sleep with you and he will most likely agree.

Words of Affirmation

| Pet Names

Sebastian calls {Name} by her first name or a nickname like “beloved." He also frequently uses things like “kitten," “dear," “darling," “my lady," “my love," etc. “Dove, could you hand me that plate? Ah, thank you.” /// “Hello, lovely, I’m taking the young master his afternoon tea; would you like me to make you something to drink, as well? Are you peckish?”

He’d also call you Kitten, Love or Darling regardless of your company

| support

He gasses Y/N up when she needs motivation.

| Bragging

On a similar note, whilst he isn’t so much inclined to brag about you, he will openly praise you to your colleagues and encourage them to learn from you. He’d scold others for their mistakes whilst uplifting your accomplishments as a staff member at the estate. Your work ethic is so much higher. You’re so much more dedicated to your work. You constantly return overwhelmingly positive results in your work. You pay more attention to detail than the others. And so on. Frankly, it’s a miracle that the others haven’t started avoiding you all together—instead finding his attitude to you almost endearing (and a point of joking ridicule in the eyes those as confident as Baldroy).

| Teasing

(Lowkey, though, Ciel totally teases Sebastian about her any chance he gets. “Ah, Sebastian, the flowers on the dining room table are lovely. (Favorite Color)-colored roses. I didn’t think we had those in our garden. I say, does Sybil take to liking them, as well?”) Teases her a lot.

| Cursing

He’d find it funny, especially in a social event where she has to be prim and proper at all times. If she swears using words like 'God' or 'Christ' (words with a religious connotation) he'd cover his mouth with one gloved hand, eyes sparkling with mirth and shoulders shaking the longer she stood there taking the Lord’s name in vain. If she used normal swears like 'fuck' or 'shit,' he’d just chuckle and mutter a “Language,” a gentle sort of chiding. If she combined them? Well, she’d be gifted with the pure sight of Sebastian turning away from the group, a hand over his mouth and shoulders shaking before he turns back with a light cough, still smirking.

| talking

Sebastian often asks for her opinions on things and loves conversing with her.

| I Love You

However, as much as Sebastian initiates, he also doesn’t tend to partake in human niceties unless he has to. So, you’d have to be the first to say “I love you” in your relationship. At first it was a pleasant remark stated between bouts of laughter on one of your many evening outings. Then it became routine. You’d say it in the morning. You’d say it before you went to sleep or retired to your rooms. If one of you would be away for a while, you’d say it. And so on. Though for a while, Sebastian would only respond with “and I you” and similar things—never actually saying it to you in return or by his own volition. Until one day, when you were out having a small picnic in the estate’s garden, when he turned to you, smiled and finally said “I love you.” And, even to his own shock, he really truly meant it—allowing the phrase to slip into his daily routine whenever he saw you.

Acts of Service

| Gentleman

Not only will he carry her purse / bag / whatever the hell she uses when her hands are full, he'll make sure she doesn’t have to lift a finger. Also, Sebastian basically carries her everywhere. He plans out the day to make sure his partner gets the stuff she needs to get done completed, but will also make sure the two of them can do something fun together. If it starts to rain, there's no doubt he'll not only give her his coat, but continuously ask, “Are you warm, Y/N?” He’s also the type to bathe his partner.

| music

He plays the violin for Y/N.

| food

He'll learn her food taste and always prepare her favorite meals and drinks. Of course, at first, they'll be terrible so she'll have to be patient and give him instructions about her likings so he could improve.

| stress

Because of the other servants’ incompetence, he tends to be very stressed. On these days, Sebastian would enjoy getting away from everyone else and just spending time with his lover. He'd have her sit beside him near a fire while Y/N reads a book or just lie down with her and watch her sleep, lightly kissing random places on her face every once in awhile.

Receiving Gifts

| Love Language

I feel like his main love language would be gift giving, or possibly physical touch (but that’s more of a consequence of his possessive side). When shopping for the young master, he’ll purchase you stuff he thinks you’ll appreciate. Jewellery (mainly necklaces). New clothing for you to wear on outings with him (including things to wear in the bedroom). Your favourite foods (whether it’s confectionary or general meals). Small trinkets. Books. Things you mentioned liking or showed interest in. etc.

| Presents

Sebastian isn't particularly one for these materialistic objects, never cared for what humans fill their lives with, yet you'll still see him treasure and thank Y/N with a heart-warming smile which is simply because she was the one who gave these items to him. Cat-themed or not, if anyone else were to give him a gift like what she did out of the kindness of their heart, it'd be burned instantly. He must agree they're indeed cute, but the reason he uses these gifts is to see her giddy smile, basking in her comments that he's adorable using the cat-themed cup or the cat-themed clothes she got matching for the two of them. While this demon may say that the only reason he keeps them is because his mate gave them to him, there'd be no hesitation to kill anyone that dares to damage those objects she gifted him. He may not express it, but he'd indeed love them more if it wasn't for his disconnection from human behavior.

Similarly, he doesn’t feel much of a need to receive gifts from you. However, he’ll occasionally show interest in things just to humour you and to see if you’ll remember—almost like a test to see how dedicated you are to these things. So anything that shows you recall he says and pay attention to his likes and dislikes, he will appreciate.

| Cats

Right, so lets start off by saying that if you love cats, Sebastian already loves you. Seriously though, you get him, you understand why he is so fascinated by felines because you share that fascination. You’re as kind as cats as you are to other humans, sometimes more so, which is something he hasn’t seen all that much before. He loves watching you interact with cats, the way you talk to them. Not to mention how you will gladly throw him over in favor of hanging out with a cat. That’s a mentality he shares and it’s nice to know there won’t be any hard feelings if he rushes off to talk to a cat or vice-versa. It’s a sort of nice unspoken understanding you two share. Whenever you walk through town together and see a cat, everyone else thinks the both of you act like crazy cat ladies. Are they right? Yes they probably are. Do you care? Absolutely not. Both of you are constantly adopting cats from off the streets. Felines love both of you and always come over to you, wanting love and attention. You, like Sebastian, enjoy watching the demon interacting with cats as well. The way his eyes light up and the little dusting of blush he gets on his cheeks is absolutely adorable to you. He on the other hand couldn’t pick his favorite thing that you do whilst talking to cats. You will quite happily curl up on the sofa or in an armchair with one. You generally encourage them to lay down on your lap or you cuddle them in your arms. You love feeling them start to purr, the vibrations running into your stomach and hands are incredibly relaxing. no matter which cat it is, you always manage to find that one spot behind their ear that they absolutely love. They will push their heads against your hand and the purring increases tenfold. It really doesn’t matter who’s watching, though if it’s Sebastian he’ll be a bit jealous that you get all the cat’s attention instead of him. He’s quite used to being the only one to talk to every cat he comes across, so having you do it as well is quite the change for him. Not that he views it as a bad thing, but do prepare for some competition over the cat. If they go to Sebastian rather than you, he is just as likely to pick the cat up when you go to talk to them, saying “No, no, he/she came to me, my darling. It’s what they want, after all.” So of course you do the same thing to him the next time your roles are reversed and he has the same flabbergasted and bewildered expression on his face that you had. The two of you are alike in the fact that you both have full on, one sided conversations with any cat you meet. You will talk about anything from how sleek their fur is and smol their paws are to the list of things you need to do today and look at how grumpy Sebastian’s being, it’s because he wants you to talk to him and not me, yes it is. The customary you’re so beautiful, what’s your name sweetheart, I love you so much stuff as well, of course. Honestly Sebastian’s surprised that you talk to and love cats as much as he does. It’s something of a welcome change to him. When you first met, he was slightly concerned you’d turn out to be like Ciel and not like them in the slightest, or be allergic, or worse both. But all of five minutes into your first conservation and you had already started talking about your own cat and about to show him a picture of them once he had all but melted at the mention of them. He can’t get enough of your cat(s), even though he’s already gathered up so many strays himself. Collectively, the both of you must have some sort of world record for owning the most cats. Naturally, something you love is to play with any of the cats you come across. At home, you have more toys than anyone could possibly imagine, your felines being the most spoiled ones in existence. But even outside, you find something to get them to play with. Sebastian swears blind that you keep a few pieces of tied up string or yarn in your pockets at all times, though try as he might he’s never managed to prove it. You always seem to know just how every cat you come across is feeling. They are unpredictable of course and you aren’t always right, but you seem to have this innate ability of knowing if they want to play or be touched, or even if they just want to be admired from a distance. Sebastian for the most part is very good at this as well and you have something of a friendly competition going on as to who can understand them better. You each think yourselves the victor, hence why it is still ongoing. The other thing you pride yourself on is finding the best cat food that London has to offer. You only get the finest for your feline friends, and they seem to think that the finest is an unnamed brand from a local independent store just down the road. It’s not particularly expensive and you have no idea how popular it is amongst cat owners, but your cats always seem happiest after you give it to them, so that is what you ensure to buy. You told Sebastian about it who, despite already thinking he bought an excellent brand, tried it out and found his cats preferred it too. You both know the store’s owner very well due to how often you go in there and she’s the nicest person ever. She lets her own cats roam around the store, so you’re both always in there far longer than you need to be. Because of course, you just have to talk to her cats.

They have a pet cat together. I assure you that she'll be visited by more than one cat or see Sebastian being surrounded by the furry little creatures, he just loves them so much. If she shares the same love for cats, he'll be so happy but slightly jealous at the same time as many of the cats, mainly the kittens, would go to Sybil. He may even go into a huff over it, which she can use to tease him.

| Clothing

We all know how great fashion sense he has so he will gladly help you to dress up, offering some suitable accesories and seizing the opportunity to feel your skin under his touch. More important, he may even project and sew something for you, basing on your personal taste and in the end making you look simply fabulously.

Physical Touch

| contact

He's attention-starved all day all night. She's gotta give this man A LOT of attention. Sebastian will become very clingy as their relationship progresses. If he's ever stressed-out or just feels like giving Y/N a hug and they're both in their shared bedroom, you can damn well guarantee she'll be stuck for an hour or two (possibly longer) being held in the demon butler's embrace.

| Public Displays of Affection

Sebastian enjoys hugs and kisses. Especially in public places because it upsets humans. It brings him great pleasure. Over time, he grasps the whole relationship lovey-dovey thing and they always fall victim to PDA and a blushing Ciel. “Alright, you two, I won’t be having any of this ‘love’ business, so Sebastian, get back to work. {Name}, kindly refrain from distracting my butler while he carries on his duties.” Sebastian wouldn't miss a chance of showing their relationship publicly. Ciel included. Ciel didn't like being included in that. It's not like Ciel has anything against his butler having a little fun with {Name}, as long as he was working fine, but he had to draw a line at excessive PDA all around his manor, and especially in places he frequently visits. Sebastian teases him about that relentlessly. He may seem very intimidating and stoic but he's — in fact — very caring and soft around {Name}, especially if it's just them in private. Whilst in public he may hold her hand or kiss her cheek but not 24/7.Though, his possessive nature does make him more willing to perform PDA:

He’ll place his coat or jacket over your shoulders and rub your arms when you’re cold
He’ll offer you his hand when you’re travelling up or down certain areas (say, exiting a carriage)
He’ll offer you his arm when you’re walking, placing his hand over your own intermittently as you converse
Kisses on the cheek (in the estate) and on the back of your hand (in public)
Guiding you with a hand on the small of your back, or just resting there as you stand side by side
And other societally appropriate ways of showing affection—saving more intimate displays for the privacy of your quarters

| Dancing

He loves to dance with her... and often ends up kissing her passionately. If they both have free time, he'd LOVE to slow dance with her! Just the both of {Name} dancing in an empty room. :) Even if they have no music, he'd still love to do it with her, either he'll hum a gentle tune or she will (if she sings, he'd probably melt) as they both gently sway side to side. He'd just come out of nowhere and be like “Would you like to dance, darling?” or something like that.

| Hair

He lets {Name} do it and laughs with her when he sees what she’s done to his hair. He really doesn’t mind; he knows his hair is soft and she’ll put it back to how it was after. He likes when she plays with his hair after they’ve had sex or when they’re trying to sleep; it actually calms him. Sebastian actually purrs. He does miss her hands being in his hair when he has to go somewhere with Ciel and can’t take her, but he lets her make up for it after by letting her put his hair in pigtails nicely. He'd mindlessly enjoy slight physical contact, trailing his fingers along {Name}'s arm and elbow when they'd be sitting next to each other, playing with her hair when she'd be falling asleep on his shoulder, leaving quick kisses behind her ear in the break between doing the chores.

| Hugs

You ever hugged someone who smells like they put on an entire can of deodorant? Yeah, that’s Sebastian. But at least his suit smells nicely like lavender. He's actually pretty huggable (when he’s not cleaning). But if he’s cleaning, he either goes “Later” or picks her up and does it that way.

| Cuddles

Being Sebastian's lover, she knew that he wasn’t all that into touch unless it meant something more. So she was really nervous when she asked him. Her hands playing with her dress as she looked down timidly. Cue the eye twitch as Sebastian looked down at her, clearly unamused. “What kind of lover would I be if I couldn’t even do this simple task?” he responded unenthusiastically as he let {Name} hug him, his arms around her shoulders. “No, like this,” she mumbled against him as she placed his arms around her waist and snuggled into him. “You can snuggle me, too, if you want?” she said cutely. As soon as he does it, he just 😍. Loves how her small form clings to his taller frame like a kitten! It makes him feel so powerful as he towers over her small frame! Tries not to smile or show that he's enjoying it. But {Name} knows better. “You like it,” she cooed as she looked up into those amber honey-dusted orbs. In turn, Sebastian glared down at {Name} as he denied it. But the minute she tries to pull away, he's tugging her back in. Randomly does it when she's being cute. Like she'd referred to her stomach as a “tum-tum.” Instantly gets pulled into a hug as he rests his head on hers. A light blush on his cheeks as he sighs (like he does when he sees a cat). Likes when {Name} give him back hugs. She's just so smol compared to him. He adores it! Definitely wouldn’t refuse if {Name} asked again. He wouldn’t have a lot of time to cuddle, but would whenever possible. It would be one of his favorite things when he needed to unwind from a stressful day. They'd lay on his bed, his arm wrapped around her waist. Most of the time, he’d like a cat or two to snuggle up next to them. He’d find extreme comfort in having the two things he loves most next to him; {Name} and cats. He’d prefer her on his lap since he enjoys the relaxing feeling of her fingers running through his hair. He’d start up a random yet casual conversation with her as she played with his hair. Probably will read something. (He doesn’t like the silence; he’s had enough of that.) When she initiates, he won’t say no. He’ll tell her about his past contracts or what shit the servants were up to. He cuddles her when she's sad or having a period; treats her like a queen. He literally does not know what to do with himself when he ain’t cuddling {Name}. He loves cuddles A LOT. When he has an issue or a problem, he'll become very cuddly. So, beware. He's usually a big spoon.

Sometimes he may be a little awkward when it comes to cuddling but he will often kiss you, knowing that this is one of the human’s favorites methods to show affection to each other. Plus, he can do miracles with those soft lips.

| Sleeping

He'll give her lots of kisses and they share a room. Since demons don’t really sleep, he just plays with her hair and traces patterns on her skin. Sebastian often tells her sweet things before bed to ensure that she has sweet dreams. [Sebastian walked into her room to wake her up, only to freeze at the sight in front of him. Was it physically possible for a mere human to embody this level of adorableness? {Name} looked cuter than any cat he'd ever seen with her messy hair. Her hand lay across her chest, which rose with every breath she drew in, and her soft pink lips parted slightly. A blanket wrapped around her body except for a leg that chose to remain outside. Sebastian smiled to himself. Only she and felines were capable of making him feel this soft. Quietly walking over to her bed, he sat beside her. His hands brushed the strands of hair that fell on her beautiful face as he sat there and admired the sight of her peaceful face for a while, leaning in to place a little kiss on her forehead, making sure that it doesn't disturb her peaceful slumber. Maybe he'd let {Name} enjoy a few more minutes of her sweet sleep.]

Whilst he doesn’t need to sleep, Sebastian will sit or lay beside you until you fall asleep. He’ll be intimate and communicate with you until then, but he always leaves to perform his other duties about the estate. So, no matter how hard you may try (getting him to lay with you in his arms, holding him tightly, etc.) you will never wake up beside him like you would a normal partner.

| Kissing

He loves kissing {Name}. His kisses range from slow and soft to rough and hard. Either way, they make her feel as if on fire. He’s very experienced, knowing every way to make her moan and sigh. Kisses on the hands are the most intimate kiss for a demon, for a butler, who has no right to touch others, even with gloves on. That’s why when she holds them and kiss his wrists, knuckles, fingers, nails, he feels so sinless. He feels human and just plain good. However, the tall man still wonders, how can {Name} voluntarily kiss his hands? After all, these are hands that have taken so many (often pure) lives. Which had seduced so many people before. Which are cold, rough, and unhealthily pale. And yet she still does it, always with the same innocent smile on her charming face that makes Sebastian feel that he has some positive emotions inside him, in his black soul. She'll definitely be his death one day. Kisses on the forehead are the most tender kiss you can get from another person, from a lover, from a partner, from a person who’s the whole life for one side of couple.

GETTING CAUGHT: He’s not shocked at all; he knows that the servants mess up and come straight to him when they do, so he just sighs and giggles at her blushing face. He'll tell whoever it is that he'll sort whatever it is later. As long as its nothing endangering. He'll turn straight back to his flushed partner and smirk, then tease her a little before capturing her in a kiss again. He’s very content with the blush that’s spread all over {Name}’s face when he pulls away again.
His favourite places to kiss you are: Your lips, Your cheek, The backs of your hands, Your neck

Sensuality

| First Time

He’d only initiate something once his partner let him know they were ready. He’d wait for as long as he needed to. Once they gave him the green light, he’d ease into it, spending the entire time letting them know how much he loves and appreciates them. He’d take the lead if they wanted him to, but he’d rather they set their own pace. He’d do his best to make his partner comfortable. While sex with him may seem to be a daunting task, he’d be fairly good at getting his lover to loosen up. He’d definitely be sure to make them orgasm once or twice before did. Their first time would be a lot of foreplay, and the actual sex (if they even got to that part during the first sexual encounter) would be quite vanilla, as well. Most of the time would be spent getting to know each other’s bodies, and getting comfortable/prepping. It would be really sensual. He’d want to be in a position where he’s close with his partner, and would really enjoy it if he could see their face as well–he’d love eye contact. He’d like to kiss them during it, as well.

Almost always dominant, but will enjoy it if his partner mixes it up every now and then (again, not very often). He can play a pretty convincing sub if he’s up to it.
He’s honestly the biggest tease ever.
He really likes skin on skin contact.
He also loves hearing his lover moan his name, as well as seeing their flustered faces. This leads to his favorite position being when his partner rides him (although, doggy style is a close second).
He’s really good at giving oral.
Initially tries not to be too rough, as he doesn’t want to hurt his partner, but if they ask him to, he’ll comply. Similarly, if he’s had a tough day, or when he’s getting close to his orgasm, he’ll tend to go a bit harder.
He’s really open to trying new things, and if his lover ever wants to try anything new in the bedroom, he’s all for it–so long as he’s sure it won’t injure his partner.
He will leave marks. Hickeys, bitemarks, anything which could mark his beloved one. However, don’t expect to find them all over your body, he would rather prefer to leave one, maybe two in visible places and make it hard to hide so everybody will know you belong to someone already.
He won’t have any compunctions to tease you in public and your protests about his hand placed between your thighs under the dining table will only make him smile wickedly and continue.
He will do anything to make you beg and please for him. Therefore, prepare for a lot of orgasm denial.
One of his not-that-numerous weak points is his back. Massaging it, caressing, kissing or scratching will make miracles to him and maybe you will have an occasion to hear him moan. Particulary focus on his shoulder blades because that is where his wings once were.
Major Sir Kink. Moan Sir out and he will immediately take you wherever you two are. Call him Sir outside the bedroom and a lustful kiss will be placed on your lips. Will only allow you to call him Sir unless you want to be edged.
Which if you are a bad girl, it brings out another kink of edging. He would make it torturous. Force you to walk around with a vibrating dildo that he controls. Making sure to edge you all day and all night. Sometimes he will do it longer if you refuse to call him Sir. You've lasted a week once. While you are talking to Ciel, he'll bring you to an almost orgasm. Before he backs off. Loves seeing your cum drip down your legs. Your soaked panties. Until the next night and you are begging for some sort of attention. Begging for him to take you.
Another kink of his is marking your body. You are his. No other damn demon will take you away. So he leaves nasty purple hickies up and down your neck. And always leave a mark on your shoulder to tell demons to back the fuck off. Would you believe another kink is just him buried deep in your pussy? The hot cavern holding his large and thick cock tight makes his head spin. He loves when your pussy automatically milks him and has the need for his seed. So he'll make sure that he is deep in you before spurting his seed.
Cock warming is another kink. Anytime he is finished with his duties with Ciel, he'll be balls deep in your pussy. And wont thrust but just hold you. Which actually makes you fall asleep faster.
A different kink of his is when you dig your nails in his hair or back. Sure it causes him some pain. But damn. Your eyes are rolled back. And you have your nails dug in. Just causes him to pound you harder. Where he can hear your moans.
Another major kink is a mix between public masturbation and public humiliation. Basically it is the morning after you two had sex and you are physically limping around the manor. You are whimpering softly. You are still extremely sensitive from the night. And your eyes are still blown wide with lust. Just for him. He can touch you and you immediately want more. He loves seeing other demons growling in jealousy . Because you have no underwear on and his cum is dripping down your legs. Your nipples are erect under your dress. His scent all over you. To show you are his. And your pussy is still soaked in your own cum and his. Ready for the next round.
He's played with bondage with you. But only likes when you are tied to the bed where you cant touch him. And you are pleading to hold on. So not a major kink.
The last kink is lace. He loves when you wear lace bras, lace thongs, lace lingerie. Sometimes will make you wear lace outfits around the manor. Ciel is clueless why you have been wearing more lace. But Sebastian is horny and hard. Just waiting to pound you deep while you wear your lace outfit. Looking so innocent. But saying such vulgar things.

A - Aftercare: This is greatly dependant on his mood and whether he's in heat. On a normal day he's decently affectionate, helping you clean up and catch your breath - occasionally even running you a warm bath and bringing fresh linens to your bed the following morning. During his heat cycle, however, he's immensely affectionate, offering aftercare in the form of back rubs, head kisses and whispers of praise - but he's far too spent to offer the typical luxuries outside of a helping hand. Though, during a particularly rough night (say you made him jealous or tested your luck just a bit too much), he'll revert back into a more sadistic state of mind, doing the bare minimum to ensure that you're decent before leaving you to dress and deal with yourself as further punishment for whatever you did to him (Sebastian Michaelis is, in other words, an incredibly petty partner).B - Body Part: Sebastian is a very narcissistic creature and, although his human form is only manifested and not really his own, he takes pride in most every part of it. Though, if he were pressed to choose one specific part, he'd likely choose his hands as whilst, yes, they hold his contract mark, he also takes immense pride in the sounds and responses he can draw from you with them alone. What a greedy, sinful creature he is. Seeing as though you are his dear mate, he finds most every part of you alluring, but if you forced him to choose he'd go with...(Fem!reader) your ass! Sebastian had practically deemed it perfect in every way from the first time he saw you bare, brazenly describing how flawless its shape was and how wonderful it felt in his hands as he groped, caressed and gently slapped the swollen flesh. Outside of the bedroom, he still finds ways to express his fondness for that part of you- oftentimes by either eating his hand lower than appropriate when guiding you or walking besides you, or by simply staring at it for a few moments before smirking and innocently getting back to work the moment you notice.(Masc!reader) your thighs! It's far from an uncommon occurrence for you to find him resting his head upon them after a particularly strenuous day of serving the young lord, his eyes unusually weary as he vents his frustrations to you. When he's possessive, he'll sit beside you and run his hand up your thigh, shameless as he gets higher and higher until his touch can be barely considered appropriate and his grip is too tight to be innocent. During sex he'll freely grasp at them to pull you into position and he'll leave striking marks along them when he gives you oral, taking pride in the way you stumble as you walk whilst knowing nobody else will be able to see what is causing you strife. All in all, regardless of their shape or size or softness, Sebastian is just unceasingly fond of your thighs and he's far from afraid to express it.(NB!reader) your stomach! He adores the way you squeal and squirm when he presses his lips and tongue against it, trailing down slowly to where you truly want him to touch you. He lives for the way it looks when its surface is completely littered with tooth marks and hickeys that blossom like dark yellow-green flowers to announce his ownership of you. The shape of it, the size of it, the feeling of it; all of them just draw him to your stomach.(Trans Fem!reader) your lips! Everything from the entrancing colours you paint them (or that they bear naturally) to the way they curve and part when you talk or smile or pant to the way they wrap so beautifully around his shaft when you're pleasing him completely draws the crow in and leaves him utterly enamoured with you.(Trans Masc!reader) your jaw! Sebastian is incredibly fond of its strong shape and he often finds himself leaving soft kisses (or harsh bites depending on the mood) along its surface, marking you as his own- as is his nature as a demon.C - Cum: Sebastian is far from human and, as such, his cum differs from that of the average human's as well: it's bitter and just barely acidic in taste as well as somewhat thick and viscous. He also tends to cum quite a lot when he does release, especially when he's in heat. He doesn't particularly mind where he releases as long as it's on or inside of you: your mouth, your ass, your face, your stomach/chest, your thighs. Anywhere is fine for him. Though, as a lazy, occasionally punishment he'll cum onto your chest and face and force you to lick yourself clean, refusing to continue pleasing you until you finish. During his heat, however, he's far more picky and is driven wild by the sight of any of your holes dripping with his seed - the sight of your being filled with him just sets off a primal satisfaction and makes him crave you even more. So, during this time, you'd best be prepared to have his seed dripping out of your (mouth/ass/cunt) during most of your intimate evenings.D - Dirty Secret: Sebastian derives a large amount of pleasure (and prideful satisfaction) from going down on you - massively preferring it to when you deep throat him - and would like to perform oral on you in areas where you could get caught as the idea massively excites him (though he'd never let something like that happen in reality as he does have to keep up the facade of the perfect Phantomhive butler).E - Experienced: Sebastian is known to have a habit of getting his dick caught in things quite easily - even using this talent to retrieve information for his masters. As such, this demon definitely knows what he's doing and you can tell that he's done this before, which allows him to be rightfully quite confident in bed.F - Favorite Position: He doesn't have any particular preference during the majority of your encounters, but he does use certain positions to punish you. For example, during a rough night he'll bend you over the edge of the bed and shove your face down into the pillows as he pounds into you from behind. Whereas during his heat he has a preference for a few distinct positions depending on his mood that evening: if he's feeling more tired and submissive he'll rather have you ride him (cowgirl/reverse cowgirl) whereas if he has more energy and feels more dominant he'd rather pound into you from a position where you are below him (either doggy style or missionary).G - Goofy: Sebastian isn't usually one to crack jokes during sex, but he will certainly tease you as much as he can (aside from certain situations).H - Hair: The demon tends to take good care of his body for you (his form is only manifested and easily changed, after all) so he's incredibly well groomed with only a small tuft of short dark hair just above his shaft that almost exactly matches the hair on his head in colour and texture.I - Intimacy: This, like most other things, depends on his mood and whether he's in heat or not. On average he can be somewhat affectionate, but not necessarily romantic, as he's aware that you're far more fragile than he is and that his energy outweighs yours by quite a bit, so he takes the time to be gentle and caring with you. During rougher encounters he is, obviously, far less concerned about you and becomes more detached, mocking and belittling you, focusing on punishing you rather than pleasing you. Likewise, when Sebastian's in heat, he'll be more focused on his own pleasure and his primal needs as opposed to being particularly romantic or comforting towards you throughout.J - Jack Off: Sebastian doesn't necessarily need to masturbate, being more than capable of finding someone to please him should the need arise, so for him to be masturbating would mean that he was either deep into his heat cycle or away from his mate and unable to get to them promptly enough for his liking. When he jacks off it's not a particularly pretty or interesting sight as he just quickly and roughly pumps his length, occasionally sliding a thumb over his tip, until he finally cums - towards the end even thrusting into his fist to get that bit more friction against himself.K - Kink• Sadomasochism (demon thing)• Marking (giving & receiving)• Bondage (giving)• Gagging (giving)• Sensory Deprivation (giving)• Voyeurism• Overstimulation (giving + receiving exclusively during heat)L - Location: He doesn't particularly mind where he takes you as long as it won't especially damage his perfect butler facade. Whilst your shared bedroom is a frequent spot (for privacy's sake), he holds a fondness for slightly more public places, such as an abandoned hallway, closet or room. Just anywhere that anyone else isn't.M - Motivation: You are his mate, so it won't take all that much for you to urge him towards the bedroom in general (especially during his heat), but there are a few things that set him off pretty quickly. These include:• your scent (perfumes and colognes are fine, but he's especially fond of your natural scent - which becomes especially clear during the peak of his mating season)• blaspheming/cussing/general feisty behaviour, teasing him• turning others down / flaunting your relationship• lingerie• propositioning him in inappropriate places• blushing and biting your lip• Any cat-like clothing, behaviour (purring) and accessoriesN - NO: Whilst he's more submissive during his heat, Sebastian is incredibly unwilling to be bound up, degraded or anything of the sort. Submission is one thing but he's the furthest thing from a BDSM Sub. He also outright refuses to share you with another immortal being (angels, demons and reapers) - its a matter of pride, principle and interspecies rivalry. He's not so adverse to other humans getting involved, however, as he sees it was a way to further illustrate how superior he is as a mate.O - Oral: Sebastian may be incredibly vain and prideful, but he's naturally more of a giver than a receiver- even more so during his heat. He adores the way you taste and most certainly knows what he's doing- his stamina is immense and once he starts he won't actually stop until you beg him to. Watching you come undone again and again because of his tongue and hands- because of him- does wonders for his ego. Even during his heat he'll spend hours revelling in your taste before working on his own overall pleasure- you are his mate, after all, and what kind of a lover would he be if he didn't take his time to please you?P - Pace: Once again, this depends on his mood and what point he's at in his heat cycle. Normally, he fluctuates freely between slow, deep, languid thrusts and a shallow, harsh, fast pace - alternating depending on how much he wants to tease you (whilst vastly favouring the harsher, faster pace when punishing you). During the peak of his heat, however, he often settles into deep, quick thrusts that are harsh and sharp enough to steal the breath from your lungs, simply pounding into you as though his life depended on it.Q - Quickie: Although he prefers to take his time in driving you mad with lust, he does hold a certain fondness for quickies. When he's been wrapped up with extra work from his master, or he's just especially needy, it's easier to just drag you into an empty room, hall or closet to have his way with you before quickly returning to work. He also quite enjoys the thrill of potentially getting caught in the act (though he'd never actually allow that as he does have an image and reputation to uphold).R - Risk: Sebastian is incredibly old - almost incomprehensibly so - and has had the time to test practically everything with his prior sexual partners. Thus he's more than willing to try out most anything asked of him with his chosen mate - though he has to constantly bare in mind how comparably fragile you are throughout the experimenting process.S - Stamina: Being a demon, Sebastian's stamina and energy outweighs yours immensely and he can go on for as many rounds as he deems necessary - usually just stopping himself when he notices you growing too tired for his taste.T - Toys: He never particularly found a need for them, but would oblige with their use if you asked if of him (read: beg). Sebastian is very sure of himself in regards to his ability to please you unaided, but he will reach for them if he's feeling particularly cruel (often leaving you tied up with a toy/vibrator/wand whilst he goes off to complete his duties) or when he wants to test you (leaving a dildo/plug/vibrator inside of you all day and using it against you whilst you both work).U - Unfair: As to be expected, Sebastian takes an immense amount of pride in his ability to make you squirm and beg for him to touch you: dragging his fingertips along your body, being as light as a feather as he intentionally avoids touching you where you need him the most; bringing you close to the edge before backing away completely until you start to come down from your peak; continuing to tease and praise you until you tell him exactly what you want him to do, where you want him to touch you and, of course, that you want him to just fuck you until you can't walk anymore. All things to be expected of a demon such as himself, naturally.V - Vocal: He falls somewhat in the middle of the spectrum in regards to how loud he can be when he's taking you. Throughout most of the year, he tends to be incredibly coherent and composed in bed with a low but audible volume. Then, he leans more towards teasing remarks and praise - dirty talking in a way that makes you weak at the knees - but when he climaxes, Sebastian will be close to silent, only letting out a few warped grunts and cusses in Latin in such a tone that the room around you seems to shake and your skin erupts in goose flesh. However, during his heat cycle it's a different story entirely; he's all moans, whimpers and cries of sheer rapture as he takes you (or as you take him). Sebastian is shameless during this time and will be continuously vocal and loud throughout the ordeal unless you gag him or urge him to bite down on something to be quieter - though the trade off is his lack of coherency as his mind is too clouded to offer you much in the way of praise or dirty talk during the act.W - Wild Card: If given the opportunity, Sebastian would take immense pride in ruining either a human that is incredibly innocent and 'pure' or an angel. The thought of tainting them with impurities and dragging them into a pit of sin really gets him going with an instinctual pride.X - X-ray: Sebastian, being a demon, can alter his human form however he sees fit, so it follows that he'd have himself presenting as well endowed but human in regards to his cock. It's long and about average in girth with an ever so slight curve to the right. The tip is about the same girth as (and is slightly darker than) his shaft.Y - Yearning: Depending on his mood, Sebastian's libido can vary greatly. When he's in heat, his libido is through the roof and he wants you almost constantly and will take you whenever and wherever he can get away with it - sometimes upwards of five to ten different sessions in a day. Usually, however, his libido is generally average and he'll only crave sex three or four times a week and will only go above that (or hold off) if you speak up. So, in general, he's ready to go almost whenever you are.Z - Zzzzzz: Demons don't need to sleep, per say, rather they can imitate the act in order to afford security and calmness to their partners or masters. So, rather than sleep, Sebastian opts to fall still beside you and watch you sleep until he needs to leave in order to fulfil his duties as a butler.

His nature and attitude causes him to care about your needs and comfort before his, since hearing your moans of pleasure will be the greatest compliment he can receive, much better than something so insignificant like his own orgasm. That being said, bringing you delight will never stop amusing and entertaining him, watching you slowly fall for him over and over, growing addicted to his touch, his soft, alabaster skin, his silver tongue whispering dirty things to your ear, his skillful tongue trailing upon your body. He will want you to feel the best you could, as if you were reaching heavens in his arms and nothing beside you two mattered in that time, that is why, Sebastian will be very cautious when it comes to what he enjoys the most.
There won’t be any trouble for him to resign from certain fetishes he likes more than the others or to learn something new if you offer that, he will be pretty open minded when it comes to sex with you. If you only allow him, he will gladly show you what he always wanted to do to you and having you mewling under him, overflowing with his cum is something he will particulary enjoy.
He will absolutely adore the feeling of your slick heat clenching around his length, your juices mixing together and creating even better friction between you two. The lewd noises your pussy will be making when he will fill you up over and over again, his seed slipping down your thighs and on the sheets and the sweet moans escaping from your mouth will be enough to make him come deep inside of you yet again.
There will always be something about filling you up which will remind him of marking you as his possession, being so close together and committing such a dirty act which many people would never speak of to the others, will cause him to believe that you invited him to the most intimate parts of your life, both physically and mentally. Sebastian will be more than happy to repeat it and in the end you may actually regret letting him go wild because since then, your sex will always be one hell of a sloppy mess — both for you and your surroundings.

FOREPLAY

ASPECT: His personal favorite physical trait of Sybil's is her stomach. IDK why, he just loves it very much.
AROUSAL: Sebastian prefers to let the sexual tension between himself and Sybil build until finally she breaks under it since he enjoys seeing his lover beg. He gets incredibly turned-on when he hears his name over and over again during sex. He likes the idea of being so in control of Sybil that she’s just drowning in pleasure and can’t grasp at anything but his name. He rarely moans. You can only get him to moan if you slowly lick his cock, with pauses between.

INTERCOURSE

LOCATION: Sebastian just likes seeing his partner flounder, and he especially likes it if she does it while trying to remain civil — such as when they are in public. Because of this, it makes Sybil nervous every time they go out together. He’ll whisper lewd things to her and then move on as if nothing happened. Meanwhile, his partner's just trying to grasp what he said, understand why he said it, and try not to let any emotion cross her face. And Sebastian just gets to sit back and watch the struggle — with a giant smirk plastered on his face. Yes, Sebastian lives for those moments.
POSITION: All of them. No, seriously, there's nothing he wouldn’t do. There are few which he may not be particularly fond of simply because he'll consider them boring, but other than that, he's always up for it. His favorite position in bed would be when he’s on his back and his lover's riding him, loving the ability to take hold of her hips and have them sway where he wants them to go. Having her on top of him and yet still having control over the pace gets him going. If their lovemaking becomes intense, he’ll grunt, gripping her thigh and hoisting it over his shoulder. That’s his favorite position to see her in.
KINKS: Best dirty talker 10/10 would recommend, he’s just too good at keeping his cool and keeping Sybil under his control with just his words. He’s full-on about what he says because, yes, she makes him feel that way and, yes, he doesn’t care that she’s flustered; in fact, that was probably what he was aiming for because he is a teaseeeeeee. Enjoys teasing her by placing feather-light kisses along her jawline and collarbone, as well as running his tongue against her ear lobe. When he makes love to Sybil, he’ll mumble sweet words into her ear and passionately demand for her to look at him when she climaxes. He has no shame and will dirty talk in her ear when people are in the room or in silent situations and it’s the worst and the best at the same time. Thinks it’s incredibly sexy when Sybil lightly sucks on the tip of his thumb. Sebastian also lowkey has a daddy kink.

SPOUSE

Marriage

...

Pregnancy

| Planning

They’d be married several years before having a child, which was completely planned from the beginning. During the pregnancy, he’ll make sure she attends all classes and takes all her vitamins, etc. she’s well-hydrated, and drop any habits bad for the baby. He’s her strongest support system and never complains, though of course he gets irritated sometimes. Maximum two children; any more's overwhelming.

| Announcement

To be honest, Sebastian was fairly sure of his s/o’s condition before they were themselves. In the position he was in, he had to know a bit of human anatomy, and with his enhanced senses, as soon as there was a child growing inside his partner, he would know. He would most likely wait until his partner told him, however, to mention anything about it, as he wasn’t sure he was correct, and didn’t want to mislead them–this also meant that he pushed away any creeping thoughts about possible parenthood. Once his partner came up to him, and confirmed his suspicions, he would be a bit conflicted. On the outside, he would look overjoyed, and would hug/kiss his partner like there was no tomorrow. On the inside, he would be in turmoil. He wasn’t in this body to reproduce, nor was he in this world to make a life for himself. It was unprofessional. After a small while of deep thinking, he would come to terms with it, and would realize that there was nothing he could do to change it now. He wouldn’t ever dream of leaving his s/o to fend for themselves, as most demons would do. He would stay and be the best father he could be. After he reached acceptance of this, he would hold his partner for hours, discussing their future, and telling them how grateful he was to have them in his life.A half-demon offspring is extremely rare, and so you panicked a lot about how you would raise them and their well-being. But Sebastian assured you at every moment that you'd be an amazing mother. Parenting is usually is difficult and delicate task, but you did not have to worry much about it since Sebastian is simply one hell of a father. Sebastian would read books on parenting all night since the moment he knew that you carried his child. He'd been preparing from several months before. So he has a lot of information on how to raise a child properly, and he executes his parenting skills with utmost perfection. Sebastian takes the responsibility of educating them and teaching them everything that they would need to know, because who else can teach better than him? His children are almost as charming and skilled as him, making Sebastian's heart swells with pride. Your child are terrifyingly similar to their father, they've even inherited his pride and ego. Good luck trying to deal with Sebastian Michaelis and a mini Sebastian Michaelis.

| Baby Moving

Sebastian’s reaction is, shall we say, more conservative, but that doesn’t mean he’s any less excited. He too will be by your side in moments when you yell that baby moved and the smile he gives you is so very genuine that you wonder if you’ve ever seen him this happy before. He immediately gathers you up into his arms, pecking your face repeatedly before kissing you fully on the lips, his own remaining firmly curled upwards. He kneels down in front of you, a hand curled protectively around your lower back and the other hovering just above your stomach. He looks back up to you, making sure you don’t mind. As you nod he rests his hand against your stomach so lightly, as gentle as you’ve ever seen him. “Hello my dear,” he whispers, forehead now resting on your stomach as well. His words are somewhat similar to Undertaker’s, and it’s clear from every one how much he wants to meet this baby. His fingertips lightly trace over your stomach as he talks, voice soft and quiet, words of care and encouragement all the way. As he finishes speaking, he stands up slowly and kisses you once again, arms curling around you and holding you close to him. The demon sways lightly with you, you copying and resting your forehead against his. His eyes are still sparkling and happiness is practically radiating off of both of you. As you stand there, to your unimaginable delight, you feel baby move again. You grin immediately and Sebastian does the same - he had been standing so close to you that he felt it ever so faintly as well. He closes his eyes and when he opens them again, deep crimson is starting to stain his irises. “I can hear their heartbeat, Y/N,” he tells you. In truth, he can hear yours and baby’s and he loves that he’s finally able to distinguish between the two. “You can?” You ask, “Is it normal? Are they healthy?” He listens again, finding baby’s heartbeat to be perfectly normal for how far along your pregnancy is. He tells you as much and he can practically feel the relief flooding through you. “Can you check every day?” You ask. You had no idea being a demon meant he would be able to hear their heartbeat and it meant you could always check they were alright without needing multiple tests and hospital trips. This was a safety net most mothers were not awarded and you couldn’t be happier that it was in place for you. Of course he agrees to it as soon as the words are out. From then on he always listens to their heartbeat just to make sure, letting you know every so often or when you ask that they are perfectly healthy. When baby kicks again your reactions are just as strong and happy as the first time and you end up standing for a long time just wrapped in each other’s embrace, your head resting on Sebastian’s shoulder and his head against yours. He swears to both you and himself that he will always protect the both of you.

| Labor

In truth, Sebastian would have everything under control. Even if it was a sudden birth, he’d be prepared for it. Even so, he’d still be a bit nervous for his lover. There were certain dangers that childbirth imposed on them, and although he was prepared for complications, he’d still be anxious–humans are so fragile, after all. He wouldn’t let any of these negative thoughts show, though, and would be super supportive of his lover. He’d constantly be giving them encouragements, and would do let them crush his hand if they had to.

| Infant

Sebastian was already gushing about how amazing his baby was. She was a beautiful baby, no doubt, however Sebastian just couldn’t shut up — which was something new. When he looked at them, he saw his own eyes staring right back at him, something he felt fairly proud of. And they had his partner’s hair, something Sybil was quite happy about. The child was a perfect mix of the two. Sebastian started tearing up a bit, willing himself to keep the tears in. He was surprised he felt this moved about something — a baby, no less. Though, he could already tell he loved the child deeper than he ever imagined possible. He stared into the baby’s eyes, mesmerized by her beauty. He and his partner had worked together to make the most stunning thing in existence.

Parent

| Fatherhood

The soccer mom™. Would throw stones at you during activities, making sure you get a perfect score every time. So competitive, when all the other parents say, “I’ll always love you, even if you lose.” He’ll be saying, “I did not spend a month teaching you the perfect performance for you to come second, go and win, ok?”. Would never use physical punishment, because he doesn’t know the full extent of his strength and may seriously maim or kill his human/halfbreed child. Headcanon demon children get abandoned and only the strong survive. Would always show up for your play/recital/thing, people wouldn’t know how he gets so much work done too (almost like he doesn’t sleep). Would homeschool you if he didn’t have work, and could teach you more than any school. Not above extortion and blackmail on school teachers and bullies. Shamelessly threatens potential love interests, might show them his fangs, if they’ve been really bad, he’ll show his true form and kill them slowly and painfully. Spoils you rotten, makes sure to get you lots of gifts when he travels and exotic ingredients. Does practically all of the cooking, but never eats unless he has to keep up human appearances.

| Kidnapping

Sebastian is going to be devastated when he learns that his (y/n) and their daughter have been kidnapped by such a vile creature. His hand grips the chair's back, and it soon shatters into innumerable pieces. He swears that he will bring them back, no matter what. Leaving the empty house, he sniffs out the location of this wrenched creature who had dared to take away his family away from him. Locating you and (d/n) by their scents, Sebastian reaches an old and broken church, where he finds the two of you tied up and slightly bruised. The sight alone was enough to make his blood boil. A laugh echoed within the walls of the old building, signaling that the stupid angel had sensed Sebastian's presence. "Release them at once," Sebastian growls, anger dripping from his voice. The angel laughs shamelessly once again, unaware that his end was soon near. "Close your eyes," Sebastian demanded, and you and your daughter immediately obeyed. The sight was not one you could bear to watch. Very soon, screams and cries filled the halls of the church, and eventually came to a stop. You shut you eyes tightly, trying to ignore the agonizing and disturbing screams. Sebastian quickly comes behind you, releasing you from your binds, followed by your daughter. You run in his arms and so does (d/n), relieved that your husband had come to your rescue. Sebastian pats yours and (d/n)'s head affectionately, making you feel safe once again. As you exit the church, it breaks down into flames and burns till only ashes remain, destroying any last trace of the angel's very existence. The Michaelis family returned back home, healthy and unharmed.

[Sebastian was one of the best fathers ever–something one wouldn’t generally expect from a demon. However, it was his own child, and he loved them dearly. He was also trying to raise them to do well in the human world, which included teaching them human ideals. He wanted to have a well-rounded, cultured, sophisticated child. Because of this mindset, he discouraged his son sleeping with his partner and himself. He could get in the habit of it, and then where would that get him? He was half demon for crying out loud, there was no need for him to be scared of anything. However, when the child came to the side of his and his partner’s bed, claiming he had a bad dream, he struggled with not telling the boy to climb in beside him–his tear-filled eyes and trembling voice broke Sebastian’s heart. He awoke his partner, hoping they’d have the heart to gently take their child back to his own room. They didn’t. And so there they were, all three lying in the bed, with the little boy in between his parents. Sebastian almost regretted letting him lie there, but when the boy curled up into his father’s chest, Sebastian figured one night wouldn’t hurt. The child’s breathing evened out, and his tight grip on his father’s shirt loosened. They really were an adorable child. As Sebastian draped one of his arms around the sleeping boy, and rested the other over his partner’s hip, he couldn’t help but stare at the small child and marvel–Wow, he and his partner did a good job.]STORIES: He reads them a a story each night. Sebastian’s the biggest loser dad ever, but also the coolest. Like, he stops in the street to pet cats for ages but he’s fought all the monsters ever. (The childrens’ favorite is about a huge spider demon called Claude).

INVOLVEMENT: As a father, he’s very involved in his child’s life and would be the type to take photos of every first moment and store them in a memory book.
PRIDE: Sebastian would be the type of parent that would always brag. He’d always be so proud, no matter how small their accomplishments were.
LOVE: Sebastian's wrapped tight around his children’s little fingers. He’d go to the ends of the Earth just to get them a specific lollipop or chocolate bar because they asked with their big eyes and pouty lip. He’s the healer of the parents, as well; his children will always go to him when they’ve been hurt in any way, mainly because he gives them chocolate so they stop crying. It hurts his big demon heart to see them cry. Sebastian’s very loving and morning cuddles are a thing.
TUTOR: Sebastian’s child would probably inherit his ego and he honestly couldn’t be prouder. Sebastian would probably tutor her himself, only because he likes his teaching techniques the best and wouldn’t want any accidents with her 'demoning' around other tutors. He’d teach them how to control their true nature and fit in with humans. Just the best husband and father ever — he spoils his family rotten.
FIRM DISCIPLINE: Sebastian never raises his voice, but makes sure they know his point of view. When they do something wrong, he gets angry and lectures them on it and how to improve next time. Not that there’ll be a next time, of course. He’d want to make sure his child knew the proper way to act around others and how to lead their life, but he'd also want them to have the freedom to do as they pleased.
He wouldn’t be very PROTECTIVE of his child. Sebastian knows that they're strong and can fight their own battles, so he’d be pretty chill about letting them get into dangerous situations. Though, if it meant their life, he'd intervene to save them.

As they become a TEENAGER, he makes sure they know self-defense and how to stand up for themselves and such.

Calls you "kitten"

Actually shows a lot of emotion around you

Would probably kill anyone who insults you

Loves to dance with you

Gets really cuddly whenever he has a problem

Doesn't want you to see his true form because he's scared you'll be afraid of him

The definition of overprotective

Plays the violin for you

SHE SOMEWHAT FLIRTS BACK WITH A PERSON

Imagine Sebastian noticing how adorable you are after seeing your silly behavior. "I can't find the word to describe you, my lady. Don't humans use the word 'cute?' Yes, you're very cute."Imagine Sebastian being enamored with you.Imagine Sebastian realizing he’s falling in love with you, a mere human.Imagine Ciel and Sebastian seeing you for the first time and realizing how sweet you are:

TRYING TO FLIRT

SHE SOMEWHAT FLIRTS BACK WITH PERSON

VERY REVEALING OUTFIT

SEEING BREASTS

Sebastian's naturally amorous and would be even more so with her. He has no shame. He acts like she's dressed the whole time, smiling at her like normal and asking how her day’s been so far all whilst she just stares at him angrily. ”SEBASTIAN!” “What, Sybil?” “There’s a little thing called knocking; you should try it sometime!” He just smirks as he leaves, imprinting her body into his mind for his own benefit.

SHE WALKS DOWN THE AISLE

PREGNANCY

I had this thought of you and him just having a rap battle together.

Most gracious Lady [L/N],

I do apologize for being so very forward in my address towards you, but it simply cannot be helped. To have seen you at Viscount Druitt's ball was a revelation — dressed as you were, like a delicate iris blossom in full bloom. Your footsteps never seemed to touch the ground, so graceful you were that I was near convinced to have seen Titania reborn. All façades faded when you turned to look at me, your pearlescent skin glowing under the crown lights. The chandeliers were crystal and gilded gold, sparkling like sunbeams on the Atlantic — and yet… your beauty outshone even that. I understand if such praise may seem frivolous to you — simple, even, coming from the hand of a mere servant. But allow me one chance to give myself to you for if I do not, my heart would surely burst from grief. There is nothing I can say that could accurately represent the accession my mind and feelings underwent. For so long I thought myself without a soul, condemned to prey upon the light of others. But one glance from you — one smile, one touch — and I find myself bathed in scripture, yearning to believe in something purer — you.Dearest Sybil, I cannot fathom how you must be feeling — disgust? Aversion? Repulsion, perhaps, by the ardor shown by me, the butler of a nobleman whose reputation proceeds him? Nevertheless, I would beg you to save me one dance at the upcoming soiree held by the Marquess of Scotney so I may smile with you again and forget my nature for a little while longer. Should the world collapse at this very moment, I would shield you from the crumbling foundation and take you away to the realm of eternal night and crown you my queen for all time.Won't you do me this one favor, dearest heart?Affectionately yours,

S. Michaelis

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