Douma is a lean and muscular young man with platinum blonde hair. His eyes were described to be extremely beautiful, with different shades of pastel rainbow colors. He's sadistic, masochistic, two-faced, and doesn't care about anyone. He was also born clinically apathetic and can't feel emotions. He just tries to hide it by acting friendly. His backstory isn't tragic like some other demons', either, as he only became a demon for fun.