Shinnosuke was first seen in the Seika Dormitory where Ryogo Nagitsuji was dividing up the requests before Rokuro Enmado storming in and crying, asking if there was anything good about him, since a girl turned him down. Shinnosuke told him that he can go to the bathroom alone at night. As Ryogo tried to convince Rokuro to become exorcist again, Atsushi Sukumozuka and Shinnosuke questioned that as they haven't seen his skills, but Ryogo told them that Rokuro was an amazing exorcist, which they still had hard time to believe.
Powers and abilities
As an exorcists, Shinnosuke is capable of using enchanting charm, but compared to Ryogo Nagitsuji and other exorcists, he is weaker.
- The name Shinnosuke means "prudent, careful" (慎) (shin), "this" (之) (no) and "help, rescue, assist" (助) (suke).
- Shinnosuke's surname Kuzaki means "country" (国) (ku) and "cape, peninsula" (崎) (saki/zaki).