Mirakurun (ミラクるん), real name Kurumi (胡桃) is the heroine of the fictional magical girl series, "Majokko Mirakurun". When transformed, she greatly resembles Chinatsu. She is often drawn in doujin works by Kyōko Toshinō, who sometimes forces Chinatsu to cosplay as her. Her objective in the series is to defeat the evil "Team Giga Giga" (composed of Rivalun, an evil magical girl, and Ganbo, a spherical robot with sunglasses) and restore the peace of the world. She is oblivious to the fact that Rivalun is her best friend when not transformed.
Although Kyōko adores the anime, Chinatsu recognizes it for its weak tongue-in-cheek satirism of the magical girl genre.
Mirakurun strongly reflects Kyōko's personality, being highly egocentric and taking advantage of her friends.
The "kawaii" facade of Mirakurun is broken in the first episode of the second season (of YuruYuri, not Mirakurun) when Mirakurun uses her finishing move, "Mirakurun Hammer" on Ganbo, causing his "skull" to cave in and him to collapse in a pool of blood.
Mirakurun appears to have died whist fighting Rivalun on the moon, and immediately prior to this the two apparently make up.
- Mirakurun loosely resembles Chiyo from Azumanga Daioh.
- The Mirakurun anime resembles the fictional anime Stardust☆Witch Meruru from the series Oreimo, and Mirakurun is voiced by Ayana Taketatsu, the same voice actress of Oreimo's main character Kirino Kousaka.