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.

Ferefi is a friendly Horse dragon who has been trying for some time to calm Eridan down to the point where he isn't always going off on one of his rages. They are not compatible for breeding purposes, but she still cares about him, though he misconstrues this as a desire to mate. Ferefi feels as though she has her work cut out for her; she just wants to roam and play like most of the dragons do, but she feels a certain sense of responsibility for Eridan's well-being. She is very courteous to all the other dragons, and only seems to raise her voice at Eridan, though it's usually for good reason. She has a teasing side, and her words can sometimes be scathing when she really doesn't mean for them to be; she can just be brutally honest.