Himari's best friends in elementary school. The three of them wished to be idols, so they formed their own idol group called Triple H. However, for unknown reasons, Himari had to leave school, and Hibari and Hikari went on to become famous idols under the name Double H. They are overjoyed after receiving the scarves that Himari knit for them. They are featured on advertisements found on Tokyo Sky Metro trains that show that day's slogan. In the show's production, there is a real group called Triple H made up of the voice actresses of Hibari, Hikari and Himari. This group sings many of the insert songs and ending themes. Their names are thinly-veiled references to Hibari Misora and Hikaru Utada, respectively.