Misakura Ranka

Yayoi's mother, and grandmother of the Misakura sisters and Aoi. The very strict principal of Misakura Girl's Academy. She patrols the academy every day, looking very intimidating with her no-nonsense personality and gigantic chest.

She's very severe towards Aoi from the moment he becomes the new teacher. But during her many lectures toward him, her actions have become-- sexual?!