Muzan's physical appearance is like that of a man in his late twenties with an unnaturally pale skin which can be easily confused as being unhealthy and sickly, curly black hair, and sharp, almond-shape eyes. His pupils are vertical, like cat eyes, and colored plum red. He also possesses sharp, blue nails on his hands. He normally wears a suit and a tie on top of a white dress shirt, along with brown dress shoes. He sometimes can be seen with a black kimono on. He's also 5'9.