Nebula Dragons are nocturnal creatures. With the best eyesight to be found, they are often seen staring into space. Each dragon tends to observe a particular nebula and will eventually change their colors and patterns to match it. As the nebula changes over time, the dragon changes with it. The more intricate the design of the nebula, the better chance an individual has of attracting a mate. It is said that the markings on no two Nebula Dragons will be exactly the same.

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.

While Seiun was young, he was abandoned by his parents to die. Although Seiun managed to survive, it made him bitter towards all dragons, and wouldn't let them near him for fear of being abandoned again. He didn't want to be hurt anymore.

One day, he met the Snow Angel named Meon la Soar. He tried to get her to leave him alone at first, but she wouldn't. She asked for him to give her a day to change his mind. Seiun reluctantly agreed, since Meon wouldn't leave him alone otherwise.

That day, Meon took him to visit many different dragon families, clans, and simple groups of friends. Seiun didn't change in one day, but Meon kept persisting, returning to Seiun when no one else ever had. It's unknown whether it was her continuing to return, the things she showed him, or a mixture of both that changed Seiun, but eventually he did change.