Chizome Akaguro

Stain, known as the Hero Slayer, is a Villain that is notorious for killing many Heroes.

Personality
Stain is evil and sinister. Stain appears to think lowly of Pro Heros, as he was disgusted that they called themselves "Heroes" and even said that they are not worthy of being Heroes. However, despite this attitude towards Heroes, Stain seems to have respect for All Might, saying that he is the only one worthy of being called a Hero.

Sports Festival Arc
Stain is introduced after killing Ingenium. In the same area as the deceased Ingenium, Stain is disgusted by the fact that Pro Heroes call themselves "Heroes", saying that they are not worthy of being Heroes. Stain declares that there is only one person that is worthy of being called a Hero. After stepping into the light, Stain claims that the only person who is worthy of being called a Hero is also the only one who is allowed to do him in and that Hero is All Might.

Stain appears again on a rooftop, saying that the current society is distorted and twisted and declares that he will make them face reality. After Black Mist appears, Stain draws his katana and aims it at Black Mist. However, Black Mist asks Stain to withhold his blade and says that he has been wanting to meet him due to his notoriety. Black Mist asks Stain for a moment of his time, teleporting Stain and himself away.

Powers and Abilities
Stain was able to kill Turbo Hero Ingenium, a popular and powerful Pro Hero without much difficulty.

Equipment and Weapons

 * Katana
 * Two Knives