Kai Chisaki

Kai Chisaki (治ち崎さき廻かい Chisaki Kai), also known as Overhaul (オーバーホール Ōbāhōru), is a Villain and the former Yakuza leader of the Shie Hassaikai. He served as the main antagonist of the Shie Hassaikai Arc.

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 due to 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, Kai's mask is removed after his battle with Izuku, leaving his mouth uncovered. Following the yakuza's defeat, he lost both arms to Mr. Compress and Tomura Shigaraki during an escort to a villain hospital. Kai 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 no socks. 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. Kai is a mysophobic, antisocial sociopath obsessed with returning the world to how it was before the Quirk phenomenon. Due to a combination of an old theory claiming Quirks derived from rats and his mysophobia, Kai believes that Quirks are a plague on humanity, having infected people with "syndromes" of heroism and villainy. He looks down upon those that use their abilities for either purpose, referring to acts of heroic sacrifice or petty crime as "sicknesses". Kai is very germaphobic and hates anything he perceives as unsanitary, frequently remarking about the unclean appearances of certain people and locations. He refuses to be touched by others or even breathe in the same air as theirs, which is one of the reasons he wears an air-filtering plague doctor mask and forces his subordinates to do the same while around him. If blood, dirt, or some other unclean substance comes in contact with Kai's person, he will start developing hives and lose his usual composure, becoming increasingly unhinged as a result. In drastic circumstances, though, Kai will let go of his aversions to crush an enemy standing in his way, either due to pragmatism or out of sheer hatred. Kai is brilliant with inventive, strategic, and tactical wits. Following the yakuza tradition of covering the trails of their crimes, Kai cleaned up his illegal actions by disassembling his targets first, taking what he needed from them, and restoring their bodies to perfect condition in the end, thus avoiding incriminating evidence of violent assault from being left behind