Grand Blue (グランブルー Guran Buru? ) is a diving shop owned by Toshio Kotegawa and the main setting of the series. It also doubles as a residence for the Kotegawas and Iori Kitahara.
Staffs[]
- Toshio Kotegawa - Owner/Manager
- Nanaka Kotegawa - Diving Instructor
Residents[]
- Chisa Kotegawa - Peek a Boo member. First year student at Izu University.
- Iori Kitahara - Peek a Boo member. First year student at Izu University.
Customers[]
- Peek a Boo
An intercollegiate diving club that uses the establishment as their meeting point for club activities and the main source for equipment and services.- Shinji Tokita - Club member. Third year student at Izu University.
- Ryūjirō Kotobuki - Club member. Third year student at Izu University.
- Azusa Hamaoka - Club member. Third year student at Oumi Women's University.
- Kōhei Imamura - Club member. First year student at Izu University.
- Aina Yoshiwara - Club member. First year student at Oumi Women's University.
- Kaya Mizuki - A famous voice actress.