Amaimon is a striking figure with his unique and intimidating appearance. His dark green hair contrasts with a lightly colored spike at the top, and his black claw-like fingernails add to his menacing presence. He is often seen wearing a jacket with cross bones as buttons, green arm warmers, and a black and pink shirt underneath. In his full demon form, he sports longer ears, two horns on his head, an alligator-like tail, and muscular green arms with red markings. Standing at an average height.