Hayao is half-dolphin and half-human. He’s 16 years old and he has grayish-teal hair and pastel teal eyes. He has a grayish-teal tail with a pastel teal tip on it. Hayao is a collected gentlemen, heals similar to Fenuku. He has an older sister named Setsuna, who is 17 years old. Hayao is classmates with Saki Hashimoto, Noa Inoue, Mio Ayahana, Karou Sugahara, Ichia Hirano, Akinari Koyama and Fenuku Suzuki. His hero name is Dolphin Sea and his weapon is a trident.