The cool, smart-girl type, Ritsuko believes in theory more than her own inner strength. Originally an intern working at 765 Production after graduating from high school, due to a lack of girls scouted by 765 Production Ritsuko became an idol herself. Despite being an idol, she still has one hand in the business side of her own celebrity, and is quick to chide the Producer if she thinks he is not doing his job correctly. Ritsuko's appearance remains conservative and business-like, as she always wears glasses and keeps her hair in two modest pigtails. No matter the costume or event in the game, she never takes her glasses off, or lets her hair down, with the exception of the pajama costume in The Idolmaster: Live For You! Her image song in The Idolm@ster is Mahou wo Kakete!, but it becomes Ippai Ippai in the SP release. In the Xbox 360 port, she shares the image song My Best Friend with Yukiho Hagiwara.