Much like Yuuri, Shuuko is another "lone wolf." She is very beautiful but has a cold exterior that drives others away. Due to experiences in middle school, Shuuko fails to trust girls. She has been in love with Tanaka-sensei, Kou's older brother, since her first year of high school after attending a guidance session between the two of them. Eventually, her trust in female relationships was restored after becoming friends with Futaba and Yuuri.