Kaiko Mikuniyama

Kaiko Mikuniyama is the girl who is in charge of adapting Itsuki's novel Imōto no Subete into manga. Kaiko is a pretty girl with loose long and smooth black hair and emerald green eyes. Kaiko is usually shown with her light pink dress and a white ribbon as accessory on top of her head, this ribbon is later revealed as a Panty Ribbon that she uses as "Formal Uniform" when she draws manga. Kaiko seems like a normal innocent girl at first but then she shows to have the same appreciation of Imoutos as Itsuki Hashima. In the later episodes Kaiko is revealed to have an Underwear Fetish that causes her to have an artistic divergence with Itsuki.