Lumina Flowlight

From the Sonic News Network, the Sonic Wiki

Lumina Flowlight appears in Sonic Shuffle as the guardian of the Precioustone in Maginary World, along with the world's goddess, Illumina. She is a pink, fairy-like being that bears some resemblance to Cosmo.

In the beginning of the game, she bring Sonic, Tails, Knuckles, Amy and (unknowingly) Eggman to Maginary World in order to get their help to repair the Precioustone, which was shattered by Void. Later, she and Void cancel each other out, following her revelation that Void is the nothingness in the imagination that allows people to dream.