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.

Blade Of Moskau is the family's only water dragon,and she spends her time swimming into the deepest parts of her lake. Almost every day,Berlin The Silver visits her, and they have a long chat. She is good friends with Taiyoh, as Taiyoh's lake of salt water is next to her's. Often, Ring Ding Ding's hyperness and excitement annoys her, as Blade Of Moskau believes that every dragon should be serious and quiet, just as she is. During past attacks, she would drag her enemies underwater, and suffocate them. But, one day, Judy Gold fished her out during an attack, and wounded her viciously, ripping off most of her fins and scales, and then tossing her aside on the ground, as the red dragon wanted Moskau to bleed to death. Luckily, Stelll saved found her and saved her. But, due to these injuries, Moskau was forced to retire, as Berlin has forbid her to fight.