Amu Hinamori, the Seiyo Academy student whose wish to find her would-be self hatched the Guardian Characters Ran, Miki, Su, and Dia, is back for a third season. As a Guardian and the Joker tasked with cleansing corrupted Heart's Eggs, Amu now meets Rikka, a lively transfer student who can also see the tiny companions. The season carries the established cast into new everyday troubles around Seiyo.