A lively and meddlesome college student from rural Akita, she resides in Ayano's dormitory. Fond of drinking, she frequently ends up in Yamato's room with her best friend, Megumi. Known for capturing compromising photos of Yamato to use as blackmail, she views their relationship as a "master and slave" dynamic. Despite this, she often tries to assist him with his relationship issues and admits to worrying about him. Yamato is one of the few people she can be vulnerable with.
She has confided in Yamato about her unrequited love for Sasaoka, whom she has liked since high school. She confessed to him fifteen times, but he dismissed it as a joke because she never followed through seriously. These rejections significantly impacted her life, leading her to change her appearance and dating behavior. Before Sasaoka left for the United States, Yamato took her to the airport so she could express her feelings one last time. Although she finally got through to him, he revealed he is already engaged to be married next year.
Surprisingly, she took this final rejection well, claiming she felt refreshed rather than devastated. After thanking Yamato, she declared she would become a better woman and find an even better man. Since then, she has reverted to her original appearance from when Yamato first met her.
