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.

Noboru acts as the guardian of the undersea Mana cave that lies at the center of the tunnel that connects Damian's Crater Clan to the Island Clan. This cave serves as a valuable Mana deposit, with shimmering Light Mana crystals providing illumination from the ceiling above and pockets of various elements lighting up every corner. Noboru is loyal to the Island Clan, who are currently in possession of the cave, but fights between the two factions are common. This Water Dragon is infamous for his strong ties with Water Mana, and is able to use it to produce geysers, large waves, and strong currents within the ring of water that encircles the cave. He does not have much personality to speak of, as he prefers sentry work to idle chit-chat.