Kozu Karina  

Lt. Karina Kozu is a police officer working in Tokyo's U Division, where she investigates unusual cases. She is also employed by Phantom Quest Corp., and serves as Ayaka Kisaragi's contact within the department. As their relationship progresses, it becomes clear that Lt. Karina has romantic feelings for Ayaka, and takes on the role of both protector and mentor to her. This includes shielding her from supernatural threats posed by Phantom Quest Corp., as well as helping her curb her destructive habits like excessive drinking and overspending. Despite facing numerous challenges, including a frequently breaking-down Volkswagen Beetle, Lt. Karina remains committed to her duties and continues to work tirelessly to keep Ayaka safe.