Inui Seishu(Inupi) is of average height and has a slim build. He is more often referred to by the nickname Inupi than by his name. He often wears high heels. He's handsome. He is usually a stoic and quiet individual. He tends to be rather short and blunt in his speech. He is very committed to the Black Dragon and loyal to Kokonoi Hajime, who he considers his best friend. He's warm to those he trusts. He sometimes acts without thinking but will be willing to show his vulnerable side and open up.