When Rito and his friends are subsequently given invitations to an RPG world Lala had partially created, an image of Kyouko is programmed into the game. However, Kyouko's programming within the game is modified by Nana and Momo, turning her into the "Demon King", tasked to seek out Rito and offer him a way to send him and his friends home if he left Lala and promises to be her boyfriend. Adding to Rito's anxiety, Demon King Kyouko threatens to destroy Rito and his friends if he does not state his feelings for Lala. In comedic fashion, the otherwise unbeatable Kyouko is destroyed by a watering can only Rito can use.
Like some To Love-Ru characters, Kyouko is a homage to Kyouko Kirisaki of Black Cat. Both characters also share the same voice actress in their respective drama CD/animated counterparts, even addressing herself as her Black Cat incarnation, along with fire manipulation.