Kai Chisaki (治ち崎さき廻かい, Chisaki Kai?), also known as Overhaul (オーバーホール, Ōbāhōru?) | Kai is usually levelheaded, thinks strategically, and seems nice at first. Whether he is acting or behaving genuinely, Kai possesses polite mannerisms and can come off as very calm and classy even to people he considers potentially troublesome. In reality, Kai is a mysophobic, antisocial sociopath who has no moral compass and an enormous ego.