She is Yoshinori's classmate and Hidari's home tutor. An honour student, but socially awkward and not good with people (especially boys).
Spoiler, click to view
She confessed to Yoshinori that she likes him, but was turned down. However, Yoshinori keeps hanging around her... currently their relationship is more than just friends, but not quite lovers. (Source: Tokyopop Volume 7)
