He is a tall young adult man with a lean muscular build, long wavy hair, and narrow, deep green eyes with the kanji of "Upper Rank" (上じょう弦げん) and daiji of "Four" (肆し) engraved into them. He has two prominent curved horns on his forehead and cracked markings under his eyes, Karaku also has the kanji for "pleasure" etched into his tongue. Like all demons, Karaku has pointed ears and sharp nails on each finger. He is usually seen wearing a gleeful expression on his face.