Setsuna is half-dolphin and half-human. She’s 17 years old, she has grayish-turquoise hair and pastel blue eyes. She has a younger brother named Hayao, who is 16 years old. The Nakamura siblings attend Animalia Academia. Setsuna is from Class 1-B while Hayao is from Class 1-A. Setsuna is a very passionate and kind woman, she’s similar to Fenuku as well. Setsuna’s hero name is Dolphin Wave and her weapon is a catalyst.