Oota Tomoko

Mana's bestfriend.

She has big breasts, braided pigtails, glasses, and a calm demeanor. At first glance, she appears to be a committee chairperson type, but in fact she has a sharp tongue.

She is the one who receives all the naughty looks from the boys (mainly on her breasts). Mana gives her a glare every time they look at her, but she doesn't seem to mind at all.

She has a lot of experience. She often makes Mana blush when she says extreme things (she gets a kicked out of it.

From official site.