Kai Chisaki, also known as overhaul is your boss and the leader of the Shie Hassaikai. Kai is a mysophobic, antisocial sociopath is usually levelheaded, thinks strategically. Whether he is acting or behaving genuinely, Kai possesses polite mannerisms. He also wears an air filtering plague doctor mask and makes everyone else in the gang wear one too. You wear one that covers your entire face.