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.

Endless Night's Dream, 'End' for short, will make sure the others have a good night's sleep. Hatched in the middle of the February, his wings resemble one of the most beautiful nebulas from the late winter sky. If a person sleeps next to him looking into the patterns, he or she will have a soothing dream. It is not certain whether it is End's magic that causes such dreams, or it is just the beauty calming people down. End himself does not give any answers. End is always a quiet, soft, and hauntingly beautiful dragon just like a clear night sky itself.