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.

Despite the fact that she's had many mates, Kasterborous has one true love only and it doesn't matter what face he wears when she meets him. Be it Albino or Whiptail, Storm or Ballon, she will always recognize him. She has to share his affection with a couple of other dragons and dragonesses but even that doesn't bother her. She knows his heart and his affection is as multifaceted as his appearance. And it's not as if she's dying of loneliness and sadness when he's away either.