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.

Zahto was raised without the company of other hatchlings. As a replacement, Riath entrusted Decidea, Yandra and Delrick with taking care of her. Being raised by adults and not having the childhood innocence most hatchlings had, she ended up being rather mature for her age, though she frowned down on any childish activity. This eventually led to the young Nebula becoming rather arrogant, believing her to be above even those that raised her. The only dragon who she associates with now is Stelatio, due to their mutual relation to the cosmos above. She spends most of her time away from the cave, high up on a cliff watching the stars.