Rainbow is the assistant leader of the Diamond Rocks. She is called the helper because she is always there to support and help anyone. She lives in a place called Stuffville, Stuffville is in a different dimension and she is a stuffed dog.

Her powers are Flight, Transformation Magic and White Magic. Her special is "Diamond Rainbow Burst".

She loves staying with her friends which is the Diamond Rocks. Her best friends are Michai and Waddles.