Magical Circle Guru Guru is a Japanese manga by Hiroyuki Etō, which was serialized in Enix's Monthly Shōnen Gangan from 1992 to 2003. It was later adapted into an anime series on October 13, 1994. A second manga series was serialized in Gangan Online in 2012.

Shoko Nakagawa is a Japanese media personality, singer, actress, voice actress, illustrator, and YouTuber. Also known by her nickname Shokotan (しょこたん), she is best known as the presenter of Pokémon Sunday, and as the performer of the opening theme from the anime Gurren Lagann.