Kai Chisaki

Chisaki, aka, Overhaul, is a villain from My Hero Academia. He is the acting leader of the Eight Precepts of Death, a Yakuza group of villainous Quirk users.

Personality
He appears to be Mysophobic and under the delusion that everybody around him is sick and hates being touched. This is shown when he kills Magne and severs Mr. Compress's arm simply for trying to touch him.

He is shown to be cruel and sociopathic. After killing Magne, he was only concerned about getting his blood on him. He uses his Quirk to disassemble and reassemble his daughter, Eri, so that he could make Quirk suppression bullets. He will do anything to make things go his way, like showering Eri with gifts so that she'll comply with his orders, exploiting suicidal people to be expendable pawns, and it is even implied that he got his father sick so that he could lead the Yakuza.

Story
At some point before his first appearance, he took control over the Yakuza after his father was stricken with an illness. However, it is implied by one of Chisaki's underlings that he didn't like how his father was leading the Yakuza, so he caused his illness to allow him to take over. He has been developing bullets that could erase somebody's Quirk. To achieve it, he used his Quirk, Overhaul, to take apart and reassemble his daughter, Eri, who has the power to suppress other Quirks.

He first appears when stopping a group of villains called the Reservoir Dogs, believing them to be sick and in need of curing. He meets Tomura Shigaraki and tells him about how he hopes to rise in the criminal underworld after the power vacuum set by All For One's arrest, much to Shigaraki's annoyance. He offers a merger with the League of Villains, but Magne is against the offer. After Magne tries attacking Chisaki, he blows up his upper body, and then severs Mr. Compress's arm after he retaliates. When Shigaraki tries to retaliate, Chisaki orders one of his minions to act as a human shield, protecting him. After Chisaki and Shigaraki calm down, they eventually agree to an alliance.

One day, during Izuku's internship with Mirio, Eri manages to escape Chisaki's clutches. Realizing they were in a situation where they couldn't stop him, Izuku grudgingly lets Chisaki take Eri back. When Chisaki returns to his lair, he kills another one of his lackeys for failing to restrain Eri.

When the heroes raid the Eight Precept's hideout, he is seen talking to his father, assuring him that everything will be alright.