Muzan Kibutsuji is a male alien (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's 18 years old . He's an alien with short black curly hair, sharp teeth, a tale with tassel and pointed ears.
Muzan is sly, cruel, sometimes mechevious, ruthless, intimidating, charming, manipulative, controlling and intelligent.
He's an alien from another planet, which is damaged, and his kind is suffering from illnesses.