Reiko Akutsu

Mother of Riko Akutsu, and a former gyaru (gal). She and her husband are always flirting and acting lovey-dovey at their home, which results in her daughter not wanting to stay there and staying at others' homes, especially Ooyama's. She and her daughter have been noted to be very similar by Ooyama. She also used to act similar to her daughter during her own high school days and used to bother her current husband and thus understands her daughter's feelings for Ooyama very well even though Riko herself doesn't fully understand/admit them and also encourages their relation.