Originating from a single species that thrived in ancient times, Xenowyrms have become an incredibly diverse breed whose appearances vary depending on their habitats. Each Xenowyrm subspecies is heavily reliant on the power of different types of mana, making them powerful magic users. Astrapi are easily the most temperamental of all Xenowyrm subspecies. Their unpredictable behavior—coupled with their masterful control of lightning magic—has the potential for devastating results. Most of their time is spent airborne, flying through the skies or circling mountainsides for prey.

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.

Atlas's personality has never been reflected upon, for she rarely enters the cave. She is an avid explorer and navigation expert, having memorized the stars and weather patterns in such a way that she can predict (and some say even control) the weather and find her way to around just by looking at the sky. The Astrapi's unpredictability makes her an extremely hard target to follow as well, her mood and direction shifting with the wind.

The only activity that Atlas has time to land for is caring for and producing young. Once her offspring become old enough to master their magic, she takes them to the air, and usually they are never seen again until the Gammess of Lightning decides to return.