Yuriko Asai

Yuriko Asai was a student at Eitoku University and graduate of Eitoku Senior High. She was the leader of the Lilies, a clique she formed with her best friends, Minako Yamano and Erika Ayuhara. Yuriko disliked Tsukushi Makino and bullied her throughout high school, though she was occasionally civil with her.

(Source: boysoverflowers Wiki)