Artist: Guardians 4, Shugo Chara Egg! Released: May 27, 2009 Genre: Japanese Pop Length: 17:18 Label: Pony Canyon Trivia: Omakase Guardian is the title of the first single by the Hello! Project unit Guardians 4. The title song is the third song used for the opening theme of Shugo Chara!! Doki—. The song has been sung by both Guardians 4 and Shugo Chara Egg!.