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.

Andalite has a strong sense of justice and honor.  He also has the unusual ability to "acquire" other animals and morph into their forms.  He can remain morphed for two hours, but he is forced to change back into his normal form after the two hours are past.  Andalite is very active, some would even say restless.  He is normally outside and only returns to the cave when he must.  Andalite knows what is going on in the Clan even when he is not present due to his advanced telepathy.