Reminder: this is not Emma Swan, this is the modern version of my princess Emma.
-GENERAL PERSONALITY & BACKSTORY (to read no matter which character you write), obviously sci-fi verses will involve necessary changes.
LOST (vigilante, passenger of 815) all characters are welcome.
THE WALKING DEAD (vigilante before the fall), all tvshow characters are welcome, main show, Dead City and The Ones Who Live.
THE LAST OF US (vigilante) will interact with everyone.
CHUCK (asset/spy) all characters are welcome.
LEVERAGE (vigilante) Nate, Sophie, Harrison, Parker, Elliot only. I'm still watching the new series.
FIREFLY (vigilante) all characters are welcome.
LIBRARIANS (vigilante, second guardian), will interact with show canon characters.
MARVEL (vigilante or spy depending on who she's interacting with and alien-ish), X-Men: MY KNOWLEDGE of the lore is scarce, based only on movies and on the fact that I have memory issues, so I'm mostly remembering characters by their vibe and following your characterization. What I mean by mcu: main shows/characters from early 2010s avengers (not too comfortable with Scarlett Johanson) & ant-man's team, guardians of the galaxy, wandavision/agatha all along (I love Elizabeth Olsen but not as Wanda), agents of shield, loki the serie, thunderbolts, technically x-mcu but: deadpool and wolverine, and the various characters from the x-men series.
DC (vigilante/alien-ish) characters from Legends of Tomorrow, also Kara, Alex, Mon El and Winn from Supergirl, while for other characters and shows please wait for me to ask for interactions.
Torchwood (vigilante/alien-ish) all main characters.
SITCOMS, DRAMAS AND OTHER MODERN SHOWS NOT MENTIONED ABOVE unless you request one of the previous backstories for a crossover (spy, examples of sitcoms and dramedies I love are: HIMYM, New Girl, TBBT, the Office, Parks & Rec, B99, Scrubs, Community, Superstore, Gilmore Girls; more 'dramatic' ones are: the Rookie, 911, Castle, Suits.) All characters are welcome.
FULL NAME: Emma Blanchard-Nolan (Known also as Swan, friendly-derogatory).
AGE: verse dependent but generally 30+.
ETHNICITY: Ashkenazi Jewish woman from her mother's side.
PARENTS: Mary Margaret Blanchard and David Nolan, she adores them / step-grandma is a murderer, verse-dependent if she's after her.
PHYSICAL MARKS: many scars. Notable ones: a knife one on the back and hip (courtesy of a fwb who from was trying to steer her away from his criminal activities) a bullet one on the left side that wasn't professionally patched up. A longer one on her chest because of a hitman sent by her step-grandma to take her heart. Old burn scar all along her spine.
LANGUAGES if they apply: English, Italian, Spanish, some French, bits of Japanese. Some Hebrew. This is the one school subject she excelled at. The older she is in our threads, the more languages she adds (depending on what we need in threads)
CITY if it applies: Born and raised in Alabama (farm girl), high school in Maine (took a class to lose the accent before starting, but slips up anyway), has a home in New York (suburbs) because they moved after her trauma, and travels all over the country, picking up slang as she goes.
NOTES: constantly Doing Things - gym, hikes, videogames, singing, parkour / bit of an attention deficit (not ADHD) / occasional devastating 24hours migraines // got a GED // Specialized in hand-to-hand combat and fighting groups of people // can tell when lied to if not emotionally involved
Triggering content for evil ex boyfriend ahead: at 16 she starts a "relationship" with an older conman named Arian, her consent is questionable (she initiated sex, but under the illusion he loved her), with severe emotional abuse involved, and after he leaves several months of depression follow. See rules for details if you aren't sure you can handle it.
Emma was a high school kid with no romantic experience, a popular jock but also naive, when Arian happened. He runs away when her parents are about to realize he exists, having already taken a lot of money from Emma; her parents learn the truth from her and go to the police but it's too late. Emma falls into depression and drops out of high school. Therapy, physical activities and emotional support help her heal, except when it comes to romance; she never dates again and is scared she may get depressed again if someone breaks her heart or, worse, that she'll be submissive again, so instead she has lots of hook ups, no strings attached.
She's a bubbly adult, human disaster, cheerful, shameless, affectionate, prone to violence, so chatty that it's easy to only say what she wants to and keep the rest to herself without people easily noticing. She gets attached to people right away, uses LOTS of petnames and gives physical affection unless asked not to. She volunteers a lot. Her family is rich, so she officially works as a pro-bono bailsbond agent/bounty hunter while chasing her "ex". If a guy convinces her she is enough for him, it will take time for her to learn to trust it to be true but she'll also unleash all the cute-feelsy sentiments she has repressed for years.
She's trying to find Arian so she can arrest him - or something else.
She's reckless, will do all sorts of dumb things; she's not unbeatable because I don't like writing overpowered characters but she is very, very skilled and experienced, fighting is basically her thing. Will enjoy an evening having drinks and dancing as much as playing videogames or rewatching Die Hard.
Her white knight tendencies and privilege push her towards gray areas most of the time, and her instinct is to punish the bad guys even when it goes against the law/rules, or to let people run away from the police if they had a good reason to break the law, basically acting as a judge: whether this means she turns into a vigilante or she's rescued from herself by becoming a spy and letting herself fall in line depends on which fandom you write in.
Before the crash: She was in Australia because looking for her ex. Years before the events of Lost after realizing that her ex was targeting women all over the world, she ended up adding illegal 'vigilanting' to her job, going after abusers and beating them within an inch of their lives (people who can't be arrested for some reason), and walking in places that were about to become crime scenes to find other criminals (important, because she learned a lot of creepy information too).
She wanted to be a protector, the hero, and lost sight of it. Could still be which is why she's a candidate.
Some skills and flaws: Her fighting style is a close-quarters, 'will beat the hell out of you with my bare hands' style, not involving crazy acrobatic moves mid-air, just trained and experienced. Can go hunting (and technically parkouring and climbing). On the downside she CANNOT fish nor cook, will be absolutely terrible at protecting herself and overprotective with others; she's actually an idiot who escalates fights with the passengers she doesn't like, which won't win her any favors when coupled with her accidentally creepy vibes and her not sharing personal information, so she may get in trouble over that too.
After the crash: When the plane crashes, given her experience with fixing wounds on the spot, she helps Jack with the injured; her explanation is that she volunteers at the hospital entertaining sick children and has seen a lot (true but not the full truth). How long she can keep that up depends; she was traveling with a gun (legally, as a bail bond woman, but she's not telling people that right away), has a lot of scars, she's strong (and nearly every morning she'll get away from the beach to exercise) and too ready to fight. Though at the beginning for sure she's just the cute sunshine-y one and nothing more.
She'd try to cooperate from the get-go, joke around, and stay cheery and nice, though. She's big on complimenting people and flirting (a reminder that this is not meant to forceship, AND the compliments are directed to women too despite her lack of attraction for them).
For a non-believer she's very ready to believe whatever her eyes see and the type who responds "it is what it is" and shrugs when confronted with the existence of a smoke monster or ghost-Walt.
Some specific little changes to canon:
Was in the group that saw the polar bear.
Is Claire and Aaron's personal guard dog most of the time (not replacing Charlie or anyone else, but she's a bit of herself in her and knows she's the best option if violence is required and Sayid isn't there). Also guards Shannon, Hurley and Charlie in particular. To be fair she'd be protective of Sayid too in particular because he's the type of person she loves, but she knows he doesn't need her help.
Charlie still kills Ethan, but there is NO WAY she wouldn't get to kick his ass when Jack is fighting him at the very end, because she holds a grudge and after "jokingly" claiming after the crash that she'd protect Claire and other more 'delicate' people (she wasn't joking) she felt responsible for not being there when she and Charlie were taken. This is also probably when others can start noticing that she fights like someone who is not just a bounty hunter.
Two options: she stays on the island and travels back to the past, nearly has a nervous breakdown looking for Claire after she disappears // Follows your muse back into the outside world but eventually wants to go back to find Claire, needs no convincing to return, just time to say goodbye.
Her involvement in specific plots depends on the other roleplayer. I assume she didn't replace any character unless you want her to, but whenever there is potential danger she runs towards it. For example when in the first season Jin attacks Michael over the watch and Sayid and Sawyer run to stop him, she'd run too and help with handcuffing Jin so that Sawyer doesn't have to drop Michael. That sort of little intervention whenever a bit of muscle is needed.
Given his interest in fiction, Hurley as an NPC would suspect her to be a spy or a serial killer, so that's one of the theories circulating without being taken seriously. She'd come up with "you can make one guess about whatever area of my life you want and if it's right I'll confirm it, if it's wrong that's it".
Everything I say now about specific characters has a 'unless you play him/her' implied (so she can be a more realistic part of the group and we can jump in without having to write introductions):
There'd initially be some unspoken friction with Jack, which she'd try to repress, because she's used to make all the decisions, and it may lead to some very spoken friction if he's an NPC and not your muse (otherwise we can skip it) which won't last forever but long enough (probably become more of a joke). Given that she had a secret gun, her story doesn't feel right, and is a little too skilled in fights, Jack has reasons to mistrust her until he's sure she's not dangerous to them. The more he learns the more it seems like she's a criminal and there is no attraction nor camaraderie to mitigate it like with Kate.
The biggest victims of her friendly flirting are Sawyer and Sayid until taken, though behind playing around she's careful and intrigued by both. She also tends to hide less of her skills around them because she's got the feeling that they'd see right through her anyway (and it's not like she doesn't have scars from bullets and knives all over).
She can feel Kate is a loner and in pain so she wants to be her friend, couldn't care less if she's a criminal because she gets to know her on the island and is sure that whatever she did had to be done.
Locke leaves her uneasy and she doesn't know why, they probably have the weirdest secret conversations. She feels she has no reason to question his faith.
Instinctively friendly to Desmond, he reminds her of her parents; didn't have much time to interact with Michael and Walt - feels weird around the kid too, sensing something is up. But would still babysit if asked.
Because she can tell when people lie and he's smart as hell, her relationship with Ben would be incredibly weird, especially since they both have moments in which they act 'threateningly civilized and polite'; same with Juliet, though afterwards she'd want to save her and get her home to her sister.
Being so protective of women and even more so of girls, she'd feel immediately connected to Rousseau but also especially with Alex, who is also the main reason she'd never so much as try to kill Ben. She calls him dad, that means something to Emma.
The Others surely have a dossier with everything including her being a vigilante, and would know she was involved in some horrifying crime scenes (not hers, but how could they know that when it happens behind walls, and every time they do get a chance to catch her in surveillance cameras she's committing violence of some sort), so they'd see her as a person who acts like a clown all the time except when she's inflicting extreme violence in secret and committing horror-movie atrocities, so their conclusions may be pretty dark (and wrong), which she'd encourage to use it against them.
By the way I operate under the assumption that if she's tricking Benjamin freaking Linus it's because he's a chess master in a challenge with someone who is playing poker; same way they say an expert chess player can be more easily beaten by a novice than by someone who plays a lot, because the latter uses official moves they'll recognize while they novice is too chaotic and hard to predict.
Your muse is allowed to notice that there is more to her than being a cheery dumbass and whatever else you want them to know.
I may use Neil/Frogurt and other less known passengers as a sacrifice to showcase that she can be an ass too and get her in trouble for her attitude, because the moment she doesn't like someone she squares up and is ready to go.
What happens to her later depends on which character she'd interact with: I want her to survive, though from the get-go she's convinced this is it for her.
This is one of those worlds in which she ended up acting as a vigilante before the Fall, punishing abusers in terrible, criminal ways - a torturer pro-bono, more than a bounty hunter.
After the world ends, her parents and close friends are lucky to end up in the Commonwealth right away. Emma becomes sort of a "recruiter", works a bit more independently than others because she made sure they'd trust her judgment, being one of the first people who joined the community, but then starts spending more and more time outside of the walls.
She's saving people she doesn't think could survive alone, but sometimes they are rejected by the Commonwealth and she keeps track of them to keep helping; she finds women in difficult positions and helps them 'join her group', and slowly starts creating a system similar to the Saviors, in the sense that she has several little settlements all over the place, in radio contact with her and with the people who are helping her "back home", but most importantly in the sense that she will give horrible executions to those who threaten her people, to make an example.
Her persona is still bubbly, friendly, seemingly a bit too innocent for this world, Emma, who will flirt with everyone like there is no tomorrow and prefers to keep an amicable relationships with the groups around her, so many of her people don't even know what she's done to protect them (much less the Commonwealth ones). They are mostly women and people who were considered too weak by other groups, which she's been training like an army, but she will always favor diplomacy (for her people's good, when it's up to her and she's the only one at risk, she's as violent as ever).
She keeps traveling with her smaller group of fighters to look for more to recruit (or save, or kill).
While she is a flirt, a reminder that she'll immediately back off if a character says no (or if it turns out they are already taken), but some of her flirtiness does depend on the fact that she has, often, 'befriended' leaders of other groups who appreciated having a pretty woman show interest in them, so she can avoid a bloodbath. She often travels with a group of women she's trained herself and has a cleaver has her weapon of choice for "Rotters" (she will, on the other hand, fight humans with her bare hands).
You can look at the generic about above, assume her parents are still alive, somewhere safe in a city that is well-guarded, helping people if she can.
The world ended when she was 14 (which makes her 34 in TLOU), and her abuser showed after, even if they lived in a still civilized safe area, so she didn't exactly have the best therapy tools at her disposal but still managed to get up.
Besides the fact that in this fandom the Infection started when she was a kid and it was 20 years ago, I want her story to be the same as the one for TWD:
Emma becomes sort of a "recruiter" for the fictional city of New Hope, a community that grew over the years and turned the city back to what it was before the Cordyceps, self-sustained but looking for new members to keep it going (thousands of people already live there). The city is isolated and well-protected.
Emma starts spending more and more time outside of the walls, saving people she doesn't think could survive alone, but sometimes they are rejected by the New Hope's recruiting system (not considered fit for the community), and she keeps track of them to keep helping life outside of New Hope; she finds women in difficult positions and helps them 'join her group', and slowly builds her own system: she has several little settlements all over the place (similar to Jackson, with their own leaders), in radio contact with her and with the people who are helping her "back home" too, and they all exchange supplies. Most importantly though, Emma's system also allows for horrible executions to those who threaten her people, to make an example out of them.
Her persona is still bubbly, friendly, seemingly a bit too innocent for this world, Emma, who will flirt with everyone like there is no tomorrow and prefers to keep an amicable relationships with the groups around her, so many of her people don't even know what she's done to protect them (much less the Commonwealth ones). They are mostly women and people who were considered too weak by other groups, which she's been training like an army, but she will always favor diplomacy (for her people's good, when it's up to her and she's the only one at risk, she's as violent as ever).
She keeps traveling with her smaller group of fighters to look for more to recruit (or save, or kill).
While she is a flirt, a reminder that she'll immediately back off if a character says no (or if it turns out they are already taken), but some of her flirtiness does depend on the fact that she has, often, 'befriended' leaders of other groups who appreciated having a pretty woman show interest in them, so she can avoid a bloodbath. She often travels with a group of women she's trained herself and has a cleaver has her weapon of choice for the Infected (she will, on the other hand, fight humans with her bare hands).
Everything that I'm about to say can be changed depending on the other canon Chuck rper involved in these plots and what they think would work for their muse. If her abusive ex boyfriend isn’t a trigger for the other rper that can also become a plot point because Emma has been hunting him down for years.
If nothing needs to be changed this is what I default to:
-NSA General Beckman is the one who found Emma, because her bounty hunter job made her see/hear too much and get accidentally involved in spy missions, and she turned out to be a great asset due to her fighting skills, loyalty, readiness to put her life on the line and ability to keep secrets (even if she can't lie unless she's prepared and putting on a full act). That, and more importantly, she can tell when people lie to her, almost as a sixth sense, unless she's emotionally compromised and has a knack for persuading people and pushing them in the right direction.
This is what saved her from going full-on vigilante, because she was right about to walk through that door after seeing too many awful things.
-There is another enemy besides the Ring/Volkoff/Hydra etc, who is stealing/recruiting assets and disillusioned agents from spy organizations, which could be Hydra, since we didn't get to see it, targeting people who are easily manipulated because they are in a bad place in their lives and using them for their evil plans. Emma is exactly the kind of person who can go after these victims and convince them to do the right thing.
-She accidentally learns that Chuck is the Intersect when they collide looking for the same bad guy early on (this to justify why she’s interacting with members of the team often enough for us to write threads, and it's pretty much what happened with agent Cole, except that she stays) and she can use Castle to keep working on her own anti-Hydra operation (which is what happened with Shaw, who took over as an expert of the Ring).
-Emma would really enjoy working at BuyMore and think Jeffster are funny and disturbing, would absolutely adore team Bartowski if they are written like in canon, including obviously Morgan and Chuck’s entire family because why wouldn’t she? She'd probably die for all of them since day one, given how good she is at reading people. She also fits well with the other employees because she’s dumb as hell when it comes to challenges and doing 'funny things’, and can use her bounty hunter job to justify bruises and weapons.
Also in any verse where Chuck and Sarah are a thing (basically if you aren't a Chuck or a Sarah who wants to explore something different, she's been flirting with Casey the entire time. If you write a Casey he can tell her to drop it and she will, obviously! It's just how she'd naturally lean in this situation and potentially hilarious in threads with others.
Bonus if needed: Regina, her step-grandmother, could have been an important member of the Ring, so Emma is personally involved and motivated when it comes to stopping them, even if it means having to give less time to her other jobs and the people she normally helps to stop a greater threat, and therefore Beckman is more motivated to trust her because Emma is the person who landed Regina in jail years before. Or maybe Regina is the one corrupting the assets.
I will expand as needed, but this is just an excuse for Emma to be allowed to stay around your characters:
Nearing her mid-twenties she has focused more on her bounty hunter job, and has slowly turned into a vigilante on top of it because her jobs (and her natural ability to make friends everywhere) keeps showing her a dark side of the world that often 'legal' agencies don't seem to be able to fight properly. She started taking secret illegal 'cases', in which she goes to punish bad guys or to capture them and leave them to be arrested by police, depending on what they did (pro-bono thug for hire? A criminal hard to catch who is making someone's life hell and is not the police' stop priority will be delivered to the closest department, an abusive man with a family who doesn't get to go to the police because afraid of what he'll do next will get every bone in his body broken by Emma).
Obviously a quick search from anyone with decent hacking skills would reveal a lot about her past since after her 'ex' left her parents took her to the police for a report. She's not on the run over vigilanting around because she hasn't been caught yet, and has the good excuse of being a bail bond woman/bounty hunter that explains a lot of her locations/being at the wrong place at the wrong time, but that doesn't change that a dedicated hacker can surely find enough surveillance tapes to put a movie together.
She never aims to kill but wants to permanently destroy/break bodies and/or scare to death (depends on what crimes were committed), but Emma has no idea whether she has killed people or not, considering she's also been involved in shootings and your average action scene, both because "working on cases" and because she happens to have friends among criminals and the police so she often ends up helping. Which means she really has seen and done a lot of dark things that are changing her perception of herself.
Still, she always tries to not kill people, nor attacks those who truly have no chance to fight back (she's not going to beat up a woman for stealing her parking spot, or to go too hard on a drunk guy who is bothering her. She tries to adapt to the opponent). She feels having rules is a must, even if they are very basic.
She may be recognized as 'The Swan' by those who know how to contact this vigilante to get help, and by criminals who temporarily were on her same path but weren't her enemies: she hides her face and real name obviously, but due to her presence in several crime-scenes and accidents she has a horrible reputation, which she encourages because it helps her avoid needless fights most of the time; if criminals she has to deal with for information think she's an unstoppable, scary monster, they are going to be more cooperative to get her out of their way. I headcanon she once stumbled in a serial killer hiding spot while not even looking for him specifically, and a bad guy searching for intel on her would see her leave the place not long before several body parts were found, and that is an example of why she gets to play the "scary part" when confronted by people who think they know her, confirming whatever they came up with.
She met the crew on a job, and since they are likely to recognize a decent person who is losing her way (but it's not too late) and someone who can give them a lot of access thanks to her connections AND help them out as a second muscle (though, mostly, since that's Elliot's role, she'd be used for her real connections on all sides of the law, she's the type to befriend a criminal very easily if they don't cross lines she's set) she gets to stick around.
I'm going to repeat the general 'vigilante backstory', just know that obviously given the different setting she wasn't born in "Alabama", doesn't live in New York and so on. I headcanon that she comes from her planet Mysthaven, but most things don't need to be changed, except like I said the locations and maybe the police being replaced by Alliance or local authorities depending on the situation. She has her own small shuttle/spaceship, she's not in trouble with authorities in general yet, and is known as the Swan by the local lowlife, as in the scary violent monster lurking in the shadows and breaking the bad guys' bones. She could be coming into contact with Mal and his crew simply because she's stupidly rich, doesn't care much about money, and could ask them for a passage (overpaying) because her shuttle is not on the planet where they meet, and she needs a ride somewhere where she'd like to collect a bounty, before she's also giving one back to her shuttle.
She's a bounty hunter who basically became a vigilante (thug for hire). She started taking secret illegal 'cases', in which she goes to punish bad guys or to capture them and leave them to be arrested by the alliance, depending on what they did (a hard to catch thief who hurt people can be given to the alliance, an abusive man with a family who can't ask for help because afraid will get every bone in his body broken by Emma).
She's not on the run over vigilanting around because she hasn't been caught yet, and has the good excuse of being a bail bond woman/bounty hunter that explains a lot of her locations/being at the wrong place at the wrong time, but that doesn't change that a dedicated hacker can surely find enough surveillance tapes to put a movie together.
She never aims to kill but wants to permanently destroy/break bodies and/or scare to death (depends on what crimes were committed). Still, she always tries not to kill people, and doesn't attacks those who truly have no chance to fight back (she tries to adapt to the opponent). She feels having rules is a must, even if they are very basic.
She may be recognized as 'The Swan' by those who know how to contact this vigilante to get help, and by criminals who temporarily were on her same path but weren't her enemies: she hides her face and real name obviously, but due to her presence in several crime-scenes and accidents she has a horrible reputation, which she encourages because it helps her avoid needless fights most of the time; if criminals she has to deal with for information think she's an unstoppable, scary monster, they are going to be more cooperative to get her out of their way. I headcanon she once stumbled in a serial killer hiding spot while not even looking for him specifically, and a bad guy searching for intel on her would see her leave the place not long before several body parts were found, and that is an example of why she gets to play the "scary part" when confronted by people who think they know her, confirming whatever they came up with.
I think that the Library itself could request her help to give Eve back up, because there are four librarians instead of one and she needs extra muscle (or maybe Emma is called to be an extra artifact-retriever, or to help Eve guard Flynn if Eve is staying behind to train the other 3, or vice versa depending on the plot). Plus there is something to be said about someone who is losing herself to darkness (going vigilante against abusers while looking for her own, not killing but still permanently damaging people, and starting to think she's the Bad Guy more and more since she doesn't feel any remorse, which in turns allows her to do worse things) but still wants to do good, and in this way she's being allowed to rediscover that she can be one of the Good Guys by guarding not only the Library but the whole team of Librarians, and using her creepy/dark knowledge to help.
She's a Protector by nature, and that's what she should go back to. She'd definitely bring the 'I have a vast net of connections with criminals and law enforcement AND I know very creepy things about the human body' resource to the table. She obviously fights as well as Eve: Eve is however superior when it comes to guns, Emma is superior in fighting multiple targets.
Just keep in mind that like I said she could be a junior guardian, a guardian to the guardian or librarians, a witch (to pay homage to her canon magical everything), or all of the above depending on your preference.
She's not a genius (in fact she'll tell you she's dumb) but she actually excels at the subjects she's interested in and her life is about finding hidden people (and nearly killing them if necessary) so she memorizes everything that is needed to do that easily, and magic is kind of her canon thing, so I'll adapt to your preferences; by default she's going to be guarding everybody else in the Library because she does have the personality of a guard dog (part half dog part golden retriever anyway, immediately affectionate) and she may or may not have an incredibly strong connection to magic.
She also lets Eve lead, she's more of a wild card, waiting to be called if backup is needed and otherwise retrieving artifacts to keep herself busy and not fall back into old habits.
Nearing her mid-twenties she has focused more on her bounty hunter job, and has slowly turned into a vigilante on top of it because her jobs (and her natural ability to make friends everywhere) keeps showing her a dark side of the world that often 'legal' agencies don't seem to be able to fight properly. She started taking secret illegal 'cases', in which she goes to punish bad guys or to capture them and leave them to be arrested by police, depending on what they did (criminals ignored by the police get the latter, abusers the former).
Obviously a quick search from anyone with decent hacking skills would reveal a lot about her past, since after her 'ex' left her parents took her to the police for a report. She has the good excuse of being a bailsbond woman/bounty hunter that explains a lot of her locations/being at the wrong place at the wrong time, but that doesn't change that a dedicated hacker can surely find enough surveillance tapes to put a movie together.
She never aims to kill but wants to permanently destroy/break bodies and/or scare people to death depending on what they did, and because she happens to have friends among criminals and the police she often ends up helping around. Which means she really has seen and done a lot of dark things that are changing her perception of herself.
She feels having rules is a must, even if they are very basic.
She may be recognized as 'The Swan'; she hides her face and real name obviously, but due to her presence in several crime-scenes and accidents she has a horrible reputation, which she encourages because it helps her avoid needless fights most of the time. I headcanon she once stumbled in a serial killer hiding spot while not even looking for him specifically, and it led some bad guys after her to believe it was her doing.
Being a vigilante is generally not enough to give her an excuse to interact with Avengers or Legends or Torchwood or anything like that, and therefore even if I don't want to overpower her much like in canon she was born with what looks like magic (in this world it's because she has alien blood, unlike canon's true love savior-blood): she's somewhere between a superhero and a vigilante, and has the power to create energy.
While she can cause some serious damage, after she is done and her adrenaline goes down her body will go in recharge mode, which can go from light fainting to sleeping to a coma. She'd have to wear some kind of mask, which she keeps changing just in case, because she doesn't want to put her family in danger by revealing her identity if she's caught using her powers. They were kickstarted by her trauma and not there for the first seventeen years of her life, with all those chemicals running through her body due to the stress, but she didn't realize she had them until after healing from her depression and getting into danger with her job.
Normally she's perfectly in control unless she has a panic attack (because if she has one, she'll have running through her body the same chemicals that made them appear in the first place, and it leads to her overchanging herself). She's still learning what she can do with them and trying to figure out why she has them.
She could be also be working for Nick Fury for MARVEL (which means she's gone from vigilante to some sort of spy/asset) or at the DEO with Supergirl for DC, in both cases likely recruited by them (unless you write one of them and don't want that) so that she can also try to change her ways and save herself. And that is how she gets to know your muse too.
I'm open to sitcoms, romcoms and dramedies that I love (and even that I don't know, sometimes, if you are willing to plot this out), if you are okay with branching out and adding dangers/wackiness and with me not having recently rewatched/knowing all details, same for a few dramas/action shows, assume she's been working with spy agencies (CIA, NSA, much like in her Chuck verse) to explain why she's living near/working with your muse while undercover; she was recruited due to her many social connections and ability to fight (she's more the muscle type than the 'I can lie' one) after one of her pro-bono jobs accidentally brought her in the middle of an open investigation and she solved the situation quickly and efficiently (by talking down an asset who was about go rogue). If you write a muse from a "serious" show then you can also keep in mind that before being recruited she was losing herself into her vigilante tendencies but was saved from it by general Beckman of the NSA, who gave her a chance.
So basically, while she's not a spy who has been trained to be a spy, but 'spy' is still the best word to describe it, she works mostly into a special division meant to prevent or fix situations in which a spy or asset is jumping ship for one reason or another, and to give them the chance and reason to stay. There could be an organization working in the opposite direction and targeting weak links in the NSA and CIA to give them more of a reason to keep Emma around, who besides her inner lie detector, her fighting abilities, her understanding of secrecy and surprising willingness to follow the rules most of the time, is also able to use her real identity of bounty hunter to cover up what she's doing. So if your muse is, for example, from the police, they'd know she's a private contractor who is helping the Captain because internal affairs said so, though you are more than free to write them as suspicious of how everything is "classified" and how much access she has to all sort of resources, going out for seemingly very high profile cases too.
This can at least open up all kinds of plots without having to rewrite the entire shows and her life to make them fit. She does have her bounty hunter job as a way to explain scars and new bruises/wounds too.
She's also that kind of annoying person who wakes up early in the morning, does a week-worth of work before midday and is sooo cheery about it all, if she's your undercover-coworkers she's that sunny one except sometimes she shows up with bruises like she got into fights.
If your show is one of the examples mentioned in the initial list, I already probably have headcanons to offer so you can also picture Emma there and be able to write your characters with her, I understand that with her being an oc you may need more info and I'm here for it!