Chizome Akaguro

Stain (ステイン Sutein), known as Hero Killer (ヒーロー殺し), is a Villain that is notorious for killing many Pro Heroes.

Appearance
Stain has mow-hawk shaped hair. He wears a sleeveless shirt and dark pants and has black shoes with metal plating. He wears a long white tattered bandage around the upper half of his face which makes him look like he is wearing a mask. Around his neck he wears a long dark tattered scarf. He has knee guards, what appears to be a watch on his left wrist, and a belt around his waist.

Personality
Stain is evil and sinister. Stain appears to think lowly of Pro Heroes, 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 heavily injuring Ingenium. In the same area as the unconscious Tensei, Stain is disgusted by the fact that Pro Heroes call themselves "Heroes", saying that they are not worthy of being Heroes. He declares that the only person who is worthy of being called a Hero is also the only one who is allowed to do him in: 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.

Field Training Arc
Black Mist brings Stain to the Villain Alliance hideout to meet with Tomura Shigaraki. Stain sees that it was Tomura's Villain Alliance that raided Yuuei and that Tomura wants Stain to join his Villain Alliance. Stain asks what Tomura's goal is, to which Tomura replies that he wants to murder All Might and destroy anything that is unsatisfiable to them such as some of the students from Class 1-A. Seeing that Tomura is being childish, Stain says that Tomura is being foolish and that there is no sense in bloodshed without a cause. The mysterious voice on the monitor orders Black Mist to allow Stain and Tomura to continue talking, saying that Tomura's meeting with Stain (an experienced infamous villain) will stimulate Tomura's growth.

Powers and Abilities
Stain was able to battle and heavily injure Ingenium, a popular and powerful Pro Hero without much difficulty, leaving him in a critical state. Stain also was able to murder 17 known Pro Heroes and crippled 23 other to the point of being unable to make a full recovery.

Equipment and Weapons

 * Katana
 * Two Daggers

All Might
Stain seems to have a great deal of respect for All Might and even states that he is the only true hero in the world.