Muupu was a fairy of the moon, who was originally from the spring of the sky. He gave Saki the extra power and item during the battles. Muupu is green colored, shaped like a ball, and floats around in the air.

Muupu first appeared in episode 24. Muupu (along with Fuupu ) was very childish and playful, and didn't listen to Saki and Mai that much.