Sayu Hisanuma

Sayu Hisamuna (久沼 さゆ, Hisanuma Sayu) is a third grade elementary school student and Miuna Shiodome's best friend who has crush on Kaname Isaki. After the time skip, she enters middle school with Miuna and decides to study hard to become an independent woman, but her crush on Kaname also grows stronger and she tries her best to overcome it. However, Kaname was the only reason that she was moving on. She eventually makes Kaname see her as a girl his age, instead of the little girl he knew before going into hibernation. In the epilogue, she is seen with her hair down in order to look more mature, likely as an attempt to impress Kaname.