Age: 17
Birthday: August 25
Height: 162 cm
Weight: 49.5 kg
3-sizes: 85/56/85 cm

A half-Earthling half-alien girl, Kyouko is a famous idol who the ability to create and throw fire at will and becomes a friend to Run when Run portrays an antagonist on her show. She is best known for her role as Magical Kyouko, a fictional magical girl character who stars in her own television serial Lala loves watching, often forcing Rito to watch it with her. She reappears again as Run askes Rito to be her date, however Kyouko is able to tell they aren't dating though wishes her luck on getting him. Ever since their first meeting on her show Run and her have done many projects together, one of which is debuting many songs together.

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. They both have same age, but their heights, weights, birthdays and bloodtypes are different.