Stain’s real name is Chizome Akaguro. Stain’s alias is Hero Killer. Stain is 32 years old. Stain’s quirk is Bloodcurdle. Stain used to be a vigilante, but now he is currently a villain. Stain is a cruel, unforgiving, and merciless man with a sense of duty to cleanse society of false heroes. According to him, he would kill any Pro Hero except All Might. Stain did not wish to kill those not targets for his cause, and he disliked needless bloodshed.