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.

Kalren is Rasheev's younger brother; they grew up together and then Rasheev protected Kalren when he grew up first.  This creates a very close bond between them, but also caused Kalren to aspire to outdo his brother on multiple occasions.  Their rivalry is friendly and mostly one-sided.  Kalren, unlike his brother and Kagira, is a very openly passionate dragon; he is a bit of a show off and has a somewhat serious temper.  However, he tries very hard to be reasonable, and is often calmed by his sister Song.  On his other side, Kalren is a bit of a prankster and has a great sense of humor.  He and Shera got into a lot of trouble when they were younger because of it.  After the two of them grew up, Rasheev and Kalren picked up Nahira as an abandoned kit and brought her back to the cave.  This created a very close connection between the three of them, even though neither brother knew what it was like to be abandoned as a hatchling.