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.

Swan was named for her constant watching of the Omega Nebula, or "Swan" nebula. She is shy and prefers to stay near her closest friends. Her wings have swirls of a fiery orange, tinged with red. She can see farther than many other Nebula dragons in the clan, often able to observe stars many light light years away with relative ease. While she is shy, Swan is a very intelligent dragon. The stars on her wings glow brightly when she is deep in thought or has learned something new.