Yumegaoka High School Year 1 Class 2 Home Teacher Diving Club Supervisor, Adviser, Consultant Shares an interest in scuba diving with Hikari. Had a competition with Hikari when she first went to school and realised that they were diving buddies. Her car is a Nissan Cube (a mini MPV) called "Pokoteng 3rd-kun". Very possible the same character in manga "Roman Club", shares exactly the same name with Katori Senkou's older sister. (Amano Kozue tends to cross over blood relatives of main characters.)