Waterhorse Dragons received their name due to their horse-like physique and endearing behavior. They are capable of surviving out of water, and when on land their skin secretes a gelatinous goo to retain moisture. However, their large paddle feet are better suited for swimming, and waterhorse dragons tend to move very awkwardly when on land. Waterhorses are very friendly dragons and enjoy playing with humans.

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.

It Is Not Slime—It Is Mucous, nicknamed "Iins-Iim" for short, lives in a small lake in the center of Lyzar's botanical gardens.  Curiously, he has a fondness for frogs; he never eats them, and is always playing with them.  As frogs also secrete a substance to protect their skin, Iins-Iim feels that they bear the brunt of a common misconception—they are slimy creatures that should be reviled, especially by young maidens.  When young noblewomen from Lyzar's castle come to visit the lake, many of them are often repulsed by the numerous frogs, and complain about how slimy and disgusting they are.  At this, Iins-Iim telepathically exclaims to them, "It is not slime!  It is mucous!"  He then explains that the girls shouldn't judge the frogs by their appearance, because one of them could be a handsome prince.