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.

Unsaddle is the captain of a pirate ship, known in some areas along the Amevian Coast as the dragon captain with a crew composed mostly of humans. That's just an effect of his sort of "trade", though. He started out as a workhorse (literally) who likely would've died from the abysmal conditions had he and other laborers not risen up. Unsaddle's brand of piracy was initially a reaction to mistreatment of naval workers, but his attention is now on any exploited workers. His crew sails along the Coast picking areas that built their fortunes on slave labor to raid. The slaves are welcomed aboard and have the opportunity join the pirates. Because the average human is easier to enslave than the average dragon, proportionally, a large number of slaves encountered are human. Hence, over time, the number of Unsaddle's human crew members rose. He doesn't care what species anyone is as long as they work together and listen to him, and he strongly encourages his dragons to believe the same.