Genos is 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.

Genos is a mechanical cyborg of average human height. 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. He has spiky blond hair and his eyebrows are blond.

