Description

The main character of the setting; a first year and the only female student of Hakuou Academy. With an invitation from childhood friend Toudou, she resolves to enroll in the institution. She lost her parents at an early age and has since been living with Yukimura Koudou, a distant relative. She has a twin brother called Nagumo Kaoru, who lives separately in another family. Their relationship has been estranged then.

[From wikia]