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. Gaia, despite their large size, are the lightest of all Xenowyrm subspecies. They possess the ability to use incredibly powerful life magic, though most of their efforts are concentrated; to them, nothing is more important than letting plant life thrive. Adult Gaia will use their magic to grow vegetation around themselves so they can spread it wherever they travel.

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.

Years ago, a powerful archmage created a Rainbow Mana stone. Since the effort involved left him too weak to live, his reasons for creating the Rainbow Mana stone remain a mystery. Before he died, the archmage trusted the Rainbow Mana Stone to a group of Xenoworms, instructing them to ensure it would never be discovered. The Xenoworms brought the Rainbow Mana stone into a hidden room beneath a cave, the same cave occupied by Hornrim. While he has no knowledge of their presence, the Rainbow Mana stone powers the crystals that grow in his cave. Gaiaxeno is the most placid and laid back of the Xeno siblings, but she is just as dedicated to protecting the Rainbow Mana stone as the others. In fact, she used her powers over the element of life to prevent them from aging because even though dragons have long life spans, they are not immortal beings. While Gaiaxeno loves her siblings equally, she is closest to Chronoxeno.