Amu Hinamori is a student at Seiyo Elementary, where she has a reputation for being super cool and stylish. Amu's real personality is in contrast very shy, and one night she makes a wish that she would have the courage to show be her "real" self. The next morning Amu finds three brightly coloured eggs, each one eventually hatching into a Guardian Character, angel-like beings able to give Amu a temporary change in personality. With the Guardian Characters, Amu's life becomes much more complex as she now struggles to deal with her new personalities and the Seiyo Elementary Guardians - a student council group where each member owns their own Guardian Character.