The deuteragonist of One-Punch Man. He is a 19-year-old cyborg and the disciple of Saitama. He is always aiming to become more powerful and he fights for justice. Under the Hero Association, he is given the name Demon Cyborg and is currently S-Class Rank 14. His face and ears look like that of a normal human, made of artificial skin material, and his eyes have black sclera with yellow irises. Genos is an extremely serious character, rarely if ever making jokes. He aims to become stronger.