Katsuragi Sayuri♀

Tsukihime (moon princess) and a 3rd-year student who is head of the Tea Ceremony Club. Refined and graceful. Her family, the Katsuragi family, is one of the oldest families that reach back to ancient times. 100% actual princess. She takes the role of suppressing outbursts from the other 3 and guiding everyone. Her voice is so soft that it almost can’t be heard. She shocks Issei by appearing beside him without a sound, even when she had no intentions of doing that. But she never speaks about herself much nor what she actually thinks.

[From Accany's review]