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.

Sakurino is not what he seems. It is very likely for him to approach humans in his waters, besides his owner. Any man fishing in his lake will be drowned, if they try to escape then eaten. It really doesn't matter; they would be dead one way or another. Sakurino's ferocious personality comes from wild dragons. When his owner place him in his lake, Sakurino watched the wild dragons attack and kill people in their territory. The Uncita clan, his clan, rejected this and tried to get Sakurino to a different lake, but he refused to go. Once this dragon got older, he became territorial and fought the other Water Dragons fort he lake. But Sakurino got unusually big, and forced them off to somewhere else. The lake was now apart of the Uncita territory. That's where Sakurino is today.