They are the older sisters to Yukari with both of them having Hachibe's ideal breasts, only 1.5 times bigger than hers. Azusa appears resembles a tomboy where Mayu resembles a girly girl.

They both easily noticed that their little sister had a secret crush on Hachibe and played with him to make her jealous. They later tell her to confess her feelings soon before someone else steals him away.