Characters — Browse every character across the manga and anime catalogue

Sayaka Kotegawa

She is Chisa and Nanaka's mother and the manager of Dophin diving pad at Palau, where Chisa, Iori, Kouhei and Aina work part-time during summer break. Sayaka is a serious and strai

Shinichirou Yamamoto

He is a first year Mechanical Engineering student at Izu University. He is a chubby young man with short hair parted in the middle. He mostly seen wearing a plain t-shirt under a s

Shinji Tokita

He is a third year Mechanical Engineering student at Izu University.

Shiori Kitahara

She is a third year middle school student and the younger sister of Iori Kitahara.

Stroheim

Takahashi Ai

Toshio Kotegawa

The owner of the diving shop Grand Blue and Iori's uncle. Toshio seems to have a jovial personality and is quite laid back, as he doesn't seem to mind all the havoc that the club m

Ushironomiya

He works as an associate professor at Izu University.

Yuu Mitarai

One of Iori's classmates at Izu University. Unlike most of the others, Yuu is in a relationship with his childhood friend Rie, which his friends immediately attempt to sabotage onc