Muzan Kibutsuji is a tall Japanese man (5'7") with a strong muscular body and unnaturally pale skin. His cat-like crimson red eyes glows. He has sharp, blue nails on his hands. He looks like he's 32, but actually he's an ancient demon over 1000 years old. He's a demon lord with short black curly hair and sharp teeth. Muzan is cold-hearted, ruthless, intimidating, charming, manipulative, controlling and intelligent. Rarely he can be sad or happy. He prefers old-fashioned, extravagant clothes.