Kayo Maruta

丸田加代, Glasses Senpai
The second student council vicepresident a shy 2ndyear student who is very close to Mitsuko being her vicepresident before Mitsuko left the school as shown in volume 4s extra chapters which also revealed her surname. Shes the only one bold enough to talk to Mitsuko casually even referring to her as Micchan. She was shown to constantly mock Mitsuko for being immature and scaring Harumi away. She appears to have a crush on Mitsuko.