Horse Dragons have equine-shaped bodies and hooves instead of claws, which allow them to be fast runners. They specialize in running takeoffs, which are quicker than taking off from a stand-still. Horse dragons are able to stalk their prey from the ground then quickly execute an aerial attack for the kill.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Rainbow is a dreamer. She doesn't care what any dragon else might think, she believes in following her dreams. She also believes in dreams about making others happy. And in sharing dreams to make them more powerful. Her best friend is the Nebula It's not easy being Green whom she helped to overcome the sadness over his colouring. The two of them also often hang around the resident Bloodscales scheming and planning with Kermit and his Patience and the members of his family on how to best achieve their wishes.