Sakura Kuriyagawa

As Key’s lifelong companion and stepsister, this young woman shares a complicated bond rooted in her father’s secret past with Toyoko Mima. While she typically presents an easygoing and carefree persona, she struggles with deep-seated insecurities and internal confusion. These hidden tensions often manifest as hysterical outbursts or trivial demands during her interactions with Key, yet despite her unpredictable temperament, she remains a deeply devoted and caring presence in her friend's life.