Kai Chisaki

"There are so many capable men and all they can think to do is rob a convenience store? Kinda weird. You'd think a group this big might just, y'know...have bigger goals than that. You're all sick. And you need a cure."

- Kai Chisaki displeased with Team Reservoir's actions in Unleashed. "Having a goal without a plan just makes you a daydreamer, and day-dreams don't make for a good sales pitch. What happens once you've expanded? How're you gonna use these people? What's your management strategy for this organization? Starting with the Hero Killer, Stain... then the carnal murderer, Muscular... and the death row inmate, Moonfish... all were heavy hitters operating under you, but they got beaten and caught. Almost like you didn't know how to use 'em, right? You can barely handle the ten or so wackos you've got already, and you wanna recruit more? No point in amassing power you can't control. So no... I didn't come here today hoping to work for you. You need a solid plan to make your goals a reality. And I'm the man with the plan."

- Kai Chisaki criticizing Tomura's lack of planning for the League of Villains.

Kai Chisaki (in Japanese: 治崎 廻 Chisaki Kai), also known by his villain name "Overhaul", is a major antagonist in the manga/anime series My Hero Academia; serving as the main antagonist of the Shie Hassaikai Arc.

He is the leader of the Shie Hassaikai, a Yakuza organization comprised of villainous Quirk-users. Following the defeat of All For One, Chisaki believes he is destined to become the next ruler of the criminal underworld and plans to destroy the current Quirk society and return the Yakuza to its former glory.

He is voiced by Kenjiro Tsuda in the Japanese version of the anime and Kellen Goff in the English version.

Personality
Chisaki appears to have mysophobia, as he is under the delusion that everybody around him is sick and hates being touched. This is shown when he kills Magne and severs Mr. Compress' arm simply for trying to touch him. He is also shown to be constantly scrubbing his arm, in fear of any contamination caught onto him.

He is shown to be cruel and sociopathic. After killing Magne, he was only concerned about getting her 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, and exploiting suicidal people to be expendable pawns. It is even implied that he got his father sick, so that he could lead the Yakuza.

Ever since All For One's downfall, Chisaki has plans of becoming the next ruler of the underworld, making him an instant rival of Tomura Shigaraki. Despite this, he is willing to negotiate agreements with him, as means for him to accomplish his goals. He also has a huge hatred for Quirks, as his goal is to destroy them by creating Quirk Destroying bullets, using Eri's Quirk to assemble them. But this didn't prevent him from becoming horrified when not only Tomura Shigaraki took his arms, but also his Quirk, making him Quirkless.

Despite his insanity, he has shown to express some sort of sentiment to the League of Villains, as he wanted to bring out the full potential of the league by having them serve under his command. He only attacked when the league decided to attack first, and even apologized for destroying Mr. Compress' arm. In the end, however, he was really using the League of Villains as pawns to further his goals and, like his own henchmen, had no care for what happens to them.

Background
In the past, Chisaki was a young street child taken in by the Yakuza's boss. Hoping to repay him for his kindness, he has been developing bullets that could erase somebody's Quirk that he could sell on the black market. To achieve it, he used his Quirk, Overhaul, to take apart and reassemble a girl named Eri, who has the power to reverse a person's physical state. However, the Boss found Chisaki's actions unethical. Believing his father to be a fool, he makes him ill so that he could lead the Yakuza and distribute the Quirk Erasure Bullets.

Hero License Exam Arc
Chisaki is first seeing stopping a group of villains called the Reservoir Dogs, believing them to be sick and in need of curing.

Shie Hassaikai Arc
Chisaki later 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 her upper body, and then severs Mr. Compress' 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 Shie Hassaikai's hideout, he is seen talking to his father, assuring him that everything will be alright. He encounters Togata Mirio, who manages to put up a decent fight. He has an underling shoot Togata with the Quirk nullifying bullet, but that doesn't stop him. When he encounters Izuku, in an act of desperation, he fuses with Shun Nemoto. After a brief fight, Eri uses her Quirk to defuse them.

Chisaki then fuses with Rikiya. After learning what Eri could do, Izuku lets Eri ride his back so that he can use One For All at 100% without hurting him. With Chisaki defeated and arrested, the police convoy taking him to prison is intercepted by the League of Villains.

When Shigaraki has Chisaki cornered, he asks if he's going to kill him, but he has something worse in mind for him. Shigaraki has had a grudge against him for killing Magne and severing Mr. Compress' arm. As payback, he and Compress sever his arms, ensuring that he could never use his Quirk again. The League of Villains then make off with the Quirk Erasure Bullets while Chisaki is left in a helpless state screaming in anger. Chisaki later receives medical treatment for his arms and has his Quirk remodeled, but due to his dangerous ideology, he was still imprisoned in Tartarus.

Former Powers and Abilities

 * Rappa Dies.pngOverhaul: Chisaki's Quirk allows him to disassemble and reassemble anyone/anything through physical contact. He is able to kill people instantly with this Quirk as shown when he blew up Magne's and Rappa's upper bodies off completely. Unlike Shigaraki's Quirk, however, Chisaki seems to have control of his to a certain degree, as he was able to only destroy Mr. Compress' arm, while he utterly destroyed Magne. However, he is shown to wear gloves, in order to curb the effects of his Quirk, implying that he has no control over the activation of it. Chisaki is also capable of reviving people from the dead with this Quirk, as he was able to reassemble Rappa's body back together. There also seems to be no limit to this, as he was able to bring back Rappa's body back together five times, after challenging him to a fight. Chisaki is also able to use this Quirk as means of fusing with others, as demonstrated on Shin Nemoto and Rikiya Katsukame. Kai Chisaki has currently lost the ability to activate his Quirk, as both his arms were destroyed by Tomura Shigaraki and Mr. Compress.

Trivia

 * Kai Chisaki shares similarities with another My Hero Academia villain, Tomura Shigaraki.
 * They are both villains who strive to become the next ruler of the underworld, leading a villainous organization as support. Their Quirks involve coming in contact with people and killing them by reducing them to bits.
 * However, unlike Shigaraki, Chisaki is a matured, experienced adult who's already had his plans ready from the get go. However, Shigaraki's maturity has slowly shown to evolve after Chisaki's defeat. Chisaki's Quirk also allows him to reassemble a person's body back to normal.
 * Like Stain, Chisaki is essentially one of the few villains that help Shigaraki's character grow. In this case, Shigaraki's experience with Chisaki helps form him into a more charismatic and mature leader.