Kaidou Kio (海堂貴緒)
Soubi's fellow art student and friend. He's an easygoing sort of guy that loves piercings, chupa-chups, and alcohol. Kio flirts with Soubi incessantly, but it's pretty one-sided.
Kio has not appeared since volume 6, in which he had an encounter with Seimei and Nisei. Many fans believe he is dead, but that remains unconfirmed in canon.