TV-Series
Description
Mirumo is a 10-centimeter-tall muglox fairy prince from the Fairy World. He sports yellow hair, blue apparel, a blue hat, dark blue shoes, and a white collar. His playful nature mixes with selfishness and laziness, especially when intense chocolate cravings derail his duties. As royalty, he wields magical maracas capable of temporarily transforming humans into fairies for 24 hours and employs his signature "butt fist" attack against weaker foes.

Escaping an arranged marriage to Princess Rima, whom he views only as a friend despite her persistent advances, he fled to the human world. There, Katie Minami summoned him using a magical blue cocoa mug. Initially reluctant to aid her romantic wishes, he gradually formed a genuine bond with Katie, shifting from mischief to cooperation. His relationships include a rivalry with the ninja fairy Yatch, blending antagonism with reluctant teamwork, and a complex dynamic with his younger brother Murumo, marked by frequent annoyance yet underlying loyalty.

His adventures involve facing bounty hunters, countering the Warumo Gang's disruptions, and performing a ritual to restore time to his frozen homeland. He later battled Darkman, a manifestation of negative emotions, defeating him with combined magic. He assisted the robotic octopus Tako in gathering seven emotion-based crystals to save a distant land. After ensuring Katie's romantic wish was fulfilled, Mirumo faced expulsion to the Fairy World. An accident during this transition erased his memories and turned him into a rabbit. Katie's unwavering dedication reversed the curse, restoring his true form and memories.

His character evolves from a self-centered runaway to someone accepting royal responsibilities and emotional bonds. The manga concludes with his marriage to Rima, while the anime emphasizes his deepened partnership with Katie and reconciliation with his princely role. His parents, King Marumo and Queen Saria, rule the Fairy World, with his father sharing Mirumo's selfish tendencies. For specific missions, he dons specialized outfits like angel costumes for emotional support or a flower queen disguise to mend hearts.