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.

Johannes Nebula knows much about the galaxy, always observing them at night time. Some even claim that he knows more than humans do about the galaxy. Many see him as a quiet dragon that usually keeps to himself. With that, not many dragons know about the galaxies nor do they dare ask him to tell them stories about the stars.  He is a close friend with Vlad Enyo, being the only other nocturnal dragon.