Saitama (サイタマ, Saitama) is the main protagonist of One-Punch Man and the titular One-Punch Man. Despite his unremarkable appearance and laid-back demeanor, he possesses overwhelming physical strength that surpasses virtually every opponent he encounters. Having achieved power beyond his original ambitions, Saitama struggles with the monotony of a life in which no battle can provide him with a genuine challenge. Beneath his indifferent attitude, however, lies a genuine desire to help others and uphold his own uncomplicated sense of heroism.

"Being a hero for fun was supposed to be exciting. So why does everything feel so ordinary?"