Sayuri Ookami  

, 大神 小百合

A third-year student named Ookami has a desire for Shinobu all to herself, despite being well-respected by her teachers and peers due to her excellent behavior. She attempts to seduce Shinobu in an empty room but is repeatedly rejected because Shinobu does not wish to hurt her feelings. Her true intention was to have Momoko lose her temper and get expelled so that she could be separated from Shinobu. This plan comes to fruition when Momoko attacks Ookami with a fire extinguisher, resulting in a quiet settlement out of court. Despite the success of her plan, it ultimately proves fruitless as Momoko and Shinobu eventually consummate their feelings several months later.