Sa-chan

Sa-chan is the wife of Katsuo Umino who comes to cheer him on during the competition in Episode 18. In the manga, it is revealed that she broke up with Katsuo after his defeat in the newcomers battle and kicked him out. Trivia:- The name Sa appears to be Katsuo Umino's nickname for her. It is unknown on what Sa-chan's full first name is, but it could be possible that one of these names could be her full name: Sachiko Saki/Sakiko/Sakika Sakura/Sakurako Saori Satomi/Satoko/Satoka Sawako Sayaka/Sayako/Sayoko Sayuri As Sa-chan is married to Katsuo, she may be known as Mrs. Umino.