Shuuko is similar to Yuuri in being independent and reserved. She's quite attractive but has a distant demeanor that pushes people away. Her experiences in middle school made it difficult for her to trust girls, which caused her to develop feelings for Tanaka-sensei, Kous older brother, during her first year of high school after attending a session between them. Through her friendship with Futaba and Yuuri, Shuuko's trust in female relationships was restored.
Due to experiences in middle school, Shuuko fails to trust girls. She has been in love with Tanaka-sensei, Kous 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.