Kazumi Yoshida

Age: 1516 Height: 160cm Weight: 51 kg Yujis classmate. She has a crush on him but is too shy to tell him directly. However she grows more confident and decidedly more direct in her advance after seeing Shanas feelings. She proclaims that she will confess sparking a rivalry between Shana and her. Source: Shakugan no Shana Wikia