Kozu Karina

Lt. Kozu Karina serves in the Tokyo Police Department's “U” Division, which handles unknown or unexplained cases, while also working with Phantom Quest Corp. As Ayaka Kisaragi's police contact, he supplies clues for her cases and tries to protect her from supernatural dangers and her own excesses.

Karina has a romantic interest in Ayaka and drives an old Volkswagen Beetle that has a habit of breaking down at inconvenient times.