The Guardian Characters aid Amu in discovering who she truly is and help fulfil Amu's dreams. These eggs hatch into three fairy-like guardians called 'Shugo Charas' (Guardian Characters): Ran (pink), Miki (blue), and Su (green). One night, Amu wishes for the courage to show her 'would-be' self, and the next morning, she finds three brightly colored eggs-pink, blue, and green-in her bed. However, her real personality is that of a very shy girl who has trouble showing her true personality. At first glance, her classmates refer to her attitude and appearance as 'cool and spicy' and rumors speculate about her personal life. The main protagonist of the story, Amu Hinamori, is a female student attending Seiyo Elementary. Main article: List of Shugo Chara! characters

The last episode aired on March 26, 2010. The new program, Shugo Chara Party! containing Shugo Chara!!! Dokki Doki and Shugo Chara Pucchi Puchi! follow the current anime series as its power-up. On October 3, 2009, Shugo Chara! began featuring another series.

On July 20, 2008, Anime News Network reported that the Shugo Chara! anime would be continued for a second year under the title Shugo Chara!! Doki-, the first episode airing on Octothe official anime website later announced an Octostart date. Shugo Chara! has also been adapted into a fifty-one episode anime television series of the same title produced by Satelight under the direction of Kenji Yasuda and debuted on Octoon TV Tokyo. It won the 2008 Kodansha Manga Award for best children's manga. Del Rey has licensed the English language manga rights, releasing the first volume on March 27, 2007. Shugo Chara! is serialized in the magazine Nakayoshi and published by Kodansha in Japan. When Amu wishes for the courage to be reborn as her would-be self, she is surprised to find three colorful eggs the next morning, which hatch into three Guardian Characters: Ran, Miki, and Su. The story centers on elementary school girl Amu Hinamori, whose popular exterior, referred to as 'cool and spicy' by her classmates, contrasts with her introverted personality. Shugo Chara! ( しゅごキャラ!, Shugo Kyara! ), also known as My Guardian Characters, is a Japanese shōjo manga series created by the manga author duo, Peach-Pit.

Shugo Chara!, Vol. 1 by Peach-Pit