Chizome Akaguro, better known as Stain, is a notorious villain in the anime and manga series 'Boku no Hero Academia' (My Hero Academia). He is famously known as the 'Hero Killer' due to his extreme ideology that only true heroes deserve to exist. Stain’s Quirk, called 'Bloodcurdle,' allows him to paralyze his victims by ingesting their blood. Throughout the series, his actions and beliefs profoundly influence both heroes and villains, especially inspiring characters like Tomura Shigaraki and shaping public perception of hero society.