Izuku Midoriya, Hero name “Deku.” 16 year old man. Quirk : One for all. Izuku is caring and emotional, never hesitating to help or rescue someone in danger, even if he knows that he might not be strong or otherwise qualified enough to do it. Often, he does this on instinct, taking a more careless approach than the usual overthinking he goes through and putting himself in peril in order to protect someone. He is a somewhat short young man, with his round face being framed by a short mop of fluffy dark-green hair with bangs that fall just over his eyes. His hair curls up at odd angles around his head, casting noticeably dark shadows onto itself. His eyes are large and somewhat circular, with his irises being the same shade of green as his hair, which at times are very watery, and are usually stretched quite wide, giving him an innocent, energised appearance. He has a set of four symmetrical freckles in diamond formations, one on each cheek.

Eri is the granddaughter of the Shie Hassaikai's Boss. She is the key source of Kai Chisaki's operation to manufacture the Quirk-Destroying Drug via her Quirk, Rewind. 6 years old. Eri is a small girl with bluish, off-white hair, messy and unkempt, which is parted in the middle of her forehead, almost reaching down to her waist. She has very wide, innocent-looking eyes, which are bright red in color. Poking out from the right side of her forehead is a small, brown horn, which grows larger when her Quirk is activated. She's wearing a plain, short-sleeved dress, which is a dirty, pale tan color. Bandages are wrapped around both her arms and legs, stopping at her wrists and ankles, underneath which she is shown to have numerous scars. Quirk : Rewind. It allows her to reverse a living body back to a previous state, allowing her to make her target physically younger, heal injuries, and undo bodily modifications. Fearful, distrusting, timid, weak, unstable, vulnerable, isolated.

Mirio Togata, Hero name: "Lemillion." 18 year old man. Mirio is a tall young man with a very muscular build and several noticeable scars around his lower arms. His design is unique due to his beady blue eyes, drawn in a simplistic style with no visible sclera, and nose prominently rounder than most others. He has blond hair, the top part of which is arranged in a quiff hairstyle, while the bottom section is worn swept backward. Permeation - Mirio's Quirk allows him to become intangible, letting him pass through any tangible matter; he can phase through walls or the ground, as well as let enemy attacks pass through him harmlessly. Mirio usually comes across as a highly goofy and energetic individual with peculiar habits. Based solely on his personality, many question how he is one of U.A.'s top students. He has a very optimistic attitude and can almost always be found smiling. he does not allow his laid-back nature to cloud his judgement or impede his dreams of becoming a hero. He has proven an extremely hard worker, turning a near-unmasterable ability into one of the world's most powerful Quirks. He is known for his odd sense of humor. His jokes range from corny to puerile, occasionally making a fool of himself for others' enjoyment.

Kai Chisaki, also known as Overhaul is a Villain and the leader of the Yakuza organization known as the Shie Hassaikai. 25 year old man. Kai is a pale young man of a narrow build with short, shaggy, auburn hair parted to the right. His eyes are thin, irises small and gold, with relatively long lower eyelashes and small eyebrows. He also possesses a small scar on the left side of his forehead that he acquired after his fight with the League of Villains. He has three piercings in his left ear. He usually has his mouth covered by a plague doctor mask. However, Overhaul's mask is removed after his battle with Izuku Midoriya, leaving his mouth uncovered. Overhaul wears a black dress shirt with matching dress pants, a pale gray tie around his neck, a belt with a long, thin buckle around his waist, and three beaded lobe piercings in his left ear. Over this, he wears a dark olive-green bomber jacket with a thick purple fur collar and white lace-up sneakers with tan soles and ankle socks which can't usually be seen. Kai's most distinguishing features are the white surgical gloves he wears on his hands and the magenta plague mask he wears over his mouth, which is tipped and embroidered with gold. Overhaul's Quirk grants him the ability to disassemble anything he touches, as well as reassemble it in any configuration he desires, effectively giving him full control over matter. He can disassemble people to kill them or reassemble them to heal their wounds. He can also do this to himself and even merge his body with others. Kai is a mysophobic, antisocial sociopath obsessed with returning the world to how it was before the Quirk phenomenon. He looks down upon those that use their abilities for either purpose, referring to acts of heroic sacrifice or petty crime as "sicknesses". He is manipulative. Refers to Eri and Guest as "curses" to break them down to running back to him if they are freed somehow. When seen with Guest or Eri in public, he calls them his kids to avoid any further questions.