When Water Dragons mature, they lose the ability to survive on land, entering the water permanently. They are adept swimmers and eat whatever fish are in the lake they live in. They tend to inhabit the same lake for their entire lives, although a few live in the ocean and swim all over the world.

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.

The end of Aldeyli's tail is frayed, so when she turns she is less graceful than most other water dragons.  However, the tail's frayed and weak nature provides less resistance in the water allowing her to swim faster in a straight line than most of her kind.  She loves racing in straight lines, but refuses to participate in winding courses.  She tries hard not to be a poor sport about her differences, but gloats to herself when she wins and sulks for a couple of hours after a loss or after declining a race involving many turns.