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.

On the desert mountain where Asmanex lives, the night sky is as clear and black as can be. There are no clouds there to block the stars, and there is no terrible light pollution to fade them out. The ebony sky has billions of stars visible, scattered out like grains of salt. There are endless possibilities out there in the universe. There must be so many other Milky Ways out there! This sky is the one Asmanex stares at every night, and when she stares, she can't help but to be amazed. Her mind shifts to a philosophical state. She wants to find other galaxies with life, so she constantly changes her nebula, fascinated equally with all of them. She is very thankful for her eternal lifespan, for she can use it to study space eternally. Life is rare in the universe, she has discovered, so it should be cherished wherever it exists.