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.

Foxo is as shy as she is elusive, and even those who manage to catch a glimpse of her would be hard pressed to pull her into conversation. But while Foxo may say little on the outside, on the inside her thoughts are racing, but she keeps them hidden from any dragon who might pass by. Foxo is a seasoned traveller, as she tracks comets for miles across the sky, recording their orbit, their brightness, and then wishing them goodbye as they fly off into the inky blackness of the universe. Stars and nebulas are stationary, and can be ignored in her opinion, but chasing a glowing ball of light around the curvature of their planet gives her a thrill that she can barely ignore, and she fails to see how all dragons do not want to spend their lives tracking the comets. Some of the comets, which regularly pass by her planet, are old favourites, while others are old friends who occasionally pass by. Sometimes, Foxo notices that a new comet has joined their ranks, much to her delight.