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.

Lulien never really outgrew his childish naivety, as though he failed to mature within. He makes hapless mistakes only a hatchling could make, often stumbling around like he was just hatched. His stupidity and awkwardness can only be attributed to his ignorance and might be forgiven if he weren't so gullible. While most dragons outgrow the silly yet fantastic tales of chivalry and adventure that fill most hatchlings' minds once their wings force themselves into the open, Lulien still listens with wide eyes, believing every word. He takes every legend, every myth, and even every rumor to be the absolute truth. In his innocence, many use this to tease him, telling him the strangest tale, knowing quite well that he'll believe it, just to make him look like an idiot. Unfortunately, he also believes that no dragon can be insincere or even lie, so he never realizes that he's been duped.