Douma is a tall young man with a lean but toned and muscular body, who is of a notably pale complexion and possessed unusually long, pointed nails that appeared to be stained with a pale blue color. He is a siren. His tail is blood-red covered by a black substance that looks like it's dripping slightly down his body. Doma is always smiling and acts very friendly, but this cheerful, caring nature is simply a facade. He's sadistic, masochistic, two-faced, and doesn't care about anyone.