Precise height: 150.2 cm Kei and Nozomi's childhood friend and a first-year student who is like a little sister to them. Her home is is a prestigious inn, and because her mother was against Sakuya enrolling in Shiomi Academy, it ultimately resulted in her running away from home and settling in Nozomi's room, and also succeeding in enrolling. Sakuya is very carefree and emotional, but also the type to get jealous easily.