Kou is an adult man. He has medium short dark blue hair with a sidebang on the right side of his face. The sidebang also has a lighter purple wisp. His eyes are blue. He wears a dark turquoise yukata, beige Japanese sandals and white socks. He wears a silver ring on his right hand.
Kou has a calm personality, but takes interest in paranormal activities and gets excited about them. He cares about Naho, not wanting her to go to Heavenly Host, as well as other people who might get trapped inside the cursed school, writing the instructions on how to get out of it.