Kenichi Saitou

An Olympic-level swimmer who missed out on gold, this dedicated instructor now focuses his energy on coaching Koyuki in both swimming and guitar. While he maintains a boisterous and intensely disciplined persona poolside, his temperament softens significantly away from the water. He often seeks Koyuki's guidance regarding his feelings for Momo, revealing a more vulnerable side. Outside of training, he is a passionate fan of British rock, particularly the fictional band Rocket Boys.