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.

Nereus was discovered as an egg by sheer luck, bobbing up and down in the frigid waters of Lake Ontario toward the turbulent waters preceding Niagara Falls. Nobody knows how he managed to slip into the water and survive that long in chill waters, but the female human who became his just happened to be visiting the falls and noticed him with her hawk eyes, and snatched him before a terrible fate was met. She transported him to a great, still lake near the mountain cave where her other dragons resided, and there he has remained quite happy, content to take his human and the hatchlings for swims under the sun.