Douma is outwardly friendly, possessing an approachable and charismatic air. Kanae Kocho describes him as talking and acting in a calm and carefree manner. 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 possesses long platinum blond hair. He has pastel-rainbow like eyes.