北見 莉央

Favorite series: Cube.
Favorite character: Mamiya Yakumo.

Rio is a second year high school student and classmates of Kyouya, Takuto and Azusa. She is a terrible gamer, a severe otaku and also a doujinshi author known enough for her yuri works on the characters in CUFFS Story's under the name "Kawai Atsume". Together with Takuto, she is the founding member of a game guild; she wants Kyouya to join it as well. A rather mediocre student, she is nevertheless very involved in her work as an artist, always finishing her work on time.

Because of her strong taste for yuri, Rio is often teased by Azusa who tells Nana to be careful around Rio because she could "attack" her at any moment. However, Rio is heterosexual (but that doesn't stop her from making Azusa believe that she would prefer to "attack" her) and she dreams of one day finding a nice boy with whom she can share her passion.