Sakuno Uryuu  

, 瓜生 桜乃

Sakuno is Shingos younger stepsister and a first-year student at Kagamidai Academy. Her father remarried Shingos mother about ten years ago. Despite having a quiet personality, she excels in cooking. However, she struggles with navigation and frequently gets lost. Alongside her brother, Sakuno was chosen as a test student and later transferred to Yuihime Girls Academy for the 1-T class, which took place on October 1st. On September 30th, the night before the transfer, she met Airi and quickly formed a close friendship with her. Additionally, Sakuno enjoys shopping at Kume Mart. Notably, among the main female characters, she is the youngest but also the tallest.