Orikura Rio♀

She’s Chihiro’s childhood friend and classmate. She’s also great in her studies. She’s Orikura Renji’s only daughter. Rio, Chihiro and Akira were always together when they were kids. Rio always lashes at Chihiro for not studying and tries to push him forward. But she herself is somewhat lacking in other parts, as Chihiro goes over to her place to clean up her room, wake her up and even cook sometimes.

[From Accany's review]