Siina Mitsuki

Japanese name:

椎名 観月

Mitsuki Siina is the president of the student council. She is a third year student and very popular amongst the student body. She likes to use Jun'ichi as her lapdog getting him to do favors for her or perform activities for the student body.

Voiced by: Misono Moriya (PC), Rie Tanaka (anime/PS2)

Wikipedia