Species: Summon
Textbook Himbo, with an emphasis on "Him." Yuou is quite possibly the absolute Strongest Being in the Universe, and he knows it. He knows it so well he wants you to know it too. He'll spend his day doing the most random jobs he can, though his absolute favorites are closing gates. A lover of basically any type of fun, Yuou is absolutely willing to spend his day helping people out if he thinks he'll have fun doing it. He's also a big fan of Lao Tzu's teachings.
Species: Summon
Pirm is very, very similar to his red bestie Yuou, though he differs in being Less of an idiot, and way less energetic. The type of guy to chill the fuck out literally any time he doesn't have to work, Pirm likes to lounge around before he goes do jobs and Punch things. He also differs from Yuou in his battle strategy, using his raw, insane power less for overwhelming enemies, and more for moving around and destroying the enemy's weak spots.
Theme: https://www.youtube.com/watch?v=HDztza-8eBs
Species: Summon
Outa is often times the serious one of the Fighter Trio with Yuou and Pirm. Though that doesn't mean he's not an idiot in his own right. A prime ragebaiting target, Outa can go from a detached but calm guy to An Absolute Murderer in just a few seconds, just because someone said the wrong things to him. Obviously, this means that he's even more overwhelming than Yuou, using less fancy moves and more Shut Up And Die moves, completely focused on utilizing the least energy possible to destroy enemies.
Species: Summon
Flammable is Fire. An uncontrolled, borderline unstoppable fire, burning quickly through all of its fuel before going down just as quick. Also a prime ragebaiting target, but instead of trying to kill someone first try, he'll scream. Really, really loud. The more he screams, the more likely he is to just punch someone, and as soon as he does, all the gloves are off, he's gonna kill Something with his fire.
Species: Summon
Ishisefo is a God. That's what he says. And...he's right, he is, but it Really doesn't feel like that, with how easy to piss off he is. Terrible at keeping his composure but also absolutely obsessed with looking calm and detached, he's the textbook example of someone you don't wanna work with, and yet he's always stuck with Flammable, the one he'll always call "The Most Annoying Man He's Ever Met," and who he would fight on sight if he could.
Theme: https://www.youtube.com/watch?v=hGZL_5Wn3aQ
Species: Human (Immortal)
Furoi is one of the Five Immortals, being one of the strongest Mages in all of history, as well as Immortal (duh). He created and to this day manages and runs the Burori Guild, one of the 5 Great Guilds of the Modern Day, using his philosophy of "helpful selfishness" to bring out the best in all of his underlings, as well as himself. He takes great interest in Flammable during The Blood Moon Prelude, wanting to teach him a "Controlled Flame."
Species: Human
Gum is one of the Top 5 Mages of the modern day. A trained assassin, Gum's techniques focus on Vision. Instead of focusing on whether or not you can see him, however, Gum chose to make sure he could always see you. His "Hebi" technique was made specifically for this, nullifying any external lights or disguise spells, and making sure he'll see his target. Gum fights with two daggers he calls "Jug" and "Ular". No one knows why.
Species: Unknown (Some Manner of Deity)
Mael is a Dungeon Raid Boss, though he differs from many others for his incredible power. Mael does not think, he only seeks more and more power, and will take any costs in order to obtain it. Although his Gate is at the second highest tier of Gate rankings, Mael is still considered by experienced Mages as the Hardest Gate Ever, no one having come close to clearing it for the 2 years it was active. Until The Summons raided it. Fighting him together, this battle made Ishisefo realize Mael's true nature.
Species: Vampire
Dracuratu is a Vampire and the heir to the throne of Vampire King after his brother Nosferacard's passing. A cunning, evil, but nonetheless easily angered man, Dracuratu made it his life goal to kill Yuou after the summon killed his brother. Since this gave him the throne, he wants revenge to prove his own power above his brother's more than anything. Dracuratu's master plan comes to a head in Season Two, with the Blood Moon Revival.