Riko Wanigaki

Riko Wanigaki (鰐垣 リコ Wanigaki Riko) is a heroine of Imouto de Ikou!

Background
Riko was a childhood friend of Hisashi, although he has since grown to dislike her. Before the game's events, she was abroad, though she has recently returned and seeks to stir up trouble for Hisashi.

Personality
Riko is described as "bohemian," as well as optimistic and a troublemaker.