Saitama (also known as One Punch Man) is the main character in the popular anime series, One Punch Man. He is the most powerful being to exist in the series. Saitama faces a self-imposed existential crisis, as he is now too powerful to gain any thrill from his deeds and actions. He is a bald, ordinary-looking man with a thin, but well-built physique, and is of average height and weight.