Garou (One Punch)

Garou is a villain, a martial arts prodigy, the self-proclaimed "Hero Hunter," and a major adversary of the Hero Association and Monster Association. He is a former disciple of Bang but was expelled from his dojo for going on a rampage. Because of his fascination with monsters, he is commonly called the "Human Monster. "Sitch of the Hero Association views him as a grave threat to the organization despite being only a human.