Yuriko Amemiya

Yuriko is Nanaka's classmate. She is an honor student, and the role model of a group of girls that dislike Nanaka. She bullies Nanaka, but discovers Nanaka's secret by accident. Nenji entrusts her to help to keep Nanaka's secret. As she gets to know them both better, she falls in love with Nenji and becomes kinder to Nanaka.

(Source: Wikipedia)