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.

Alexander is the oldest Nebula in his cave, and the father of many. His lifemate is a Pink named Deltha. Being what he is, this caused a little bit of complication at first since Alexander is Nocturnal and Deltha was diurnal. The two wanted to be together, but that grew more and more difficult with one awake while the other slept. Seeing this, Deltha's friend Adeltaen suggested that she try stargazing late at night.

Deltha did so, and the more often she did, the later she stayed up gazing st the beauty of the stars. Alexander would take to the skies and flash his beautiful pattern in line with his Nebula. The diurnal Pink slowly became nocturnal, and the two have since lived out their happily ever after.