Saitou, Kenichi

斉藤研一

Saitou, who serves as Koyuki's guitar and swimming instructor, previously competed in the Olympics but failed to realize his dream of winning, leading him to dedicate his life to teaching others how to swim more effectively. He is loud and demanding in public settings, particularly strict regarding swimming. However, away from the water, he is considerably more open, even seeking Koyuki's advice concerning his attraction to Momo. Saitou is an enthusiast of British rock, and his favorite band within the anime is the fictional Rocket Boys.