Chizome Akaguro, also known as Hero Killer: Stain is a villain and vigilante that is notorious for having killed many Pro Heroes. He believes that those who become Heroes for fame or money are unworthy of being called the name and only All Might is a true hero. His Quirk is called “Bloodcurdle”, a Emmiter-Type Quirk that allows Chizome to paralyze his target upon tasting a sample of their blood. The amount of time a victim remains paralyzed depends on their blood type.