Water Walkers are small dragons that are frequently found around bogs and ponds. While they are flightless, they retain the flight sacs and hollow bones of their airborne cousins. These traits, coupled with their extraordinarily long, webbed toes, allow them to stand on top of calm waters, using their small sails to propel them wherever they please. They spend the majority of their lives on the water, retreating to the tops of lily pads when the waters become too rough to float atop.

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.

Usually seen walking on inland bodies of water, he was given the name "Lake" and the epithet "Ryuuhosei", which is Japanese and means "Dragon Walking Star".

Before a single dragon, which are in the same scroll like him, wakes up, he leaves the cave, searching a place rich of liquid to walk on, and returns after all of them have fallen asleep. This is the reason why other dragons have trouble to interact with him. He is not a very talk-active dragon and prefers to be alone.

However, it is said that he performs a dance on full-moon nights, using the water surface as his stage.