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.

Indigo is stern and precise, and this fits the leader of the defensive forces of Nadat's cave. As he's mobile on ground and air, Indigo is highly qualified to manage others. He has one soft spot, and that's for young dragons who are eager to learn how to better themselves and protect others. These ones he'll gladly spend time with, using up his free time to make sure they fulfill their potential.