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.

Undomiel loves the evening hours far more than the deepest hours of the night. When the first stars show themselves yet the sky still holds the last light of the day, when her diurnal friends are still awake enough for a friendly conversation and the Nocturnes slowly awake, that's the best time of the day. She also thinks the sky can never compare to the beauty of those few moments, but sadly it never holds long enough to imprint itself onto her wings.