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. Aquilo live high in the firmament and are almost never seen on the ground. They are all too happy to greet travelers going through the mountains, and also seeing their panic as the Aquilos dive from great heights towards them, only to change course at the last moment and soar back into the sky. Many Aquilo enjoy testing their agility and mastery of air magics in dangerous feats of flying at one another, only to twist and harmlessly pass one another in intricate patterns. They try, with little success, to get the more foul-tempered Astrapi to join in their games.

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.

Cyroxeno came from a family of wyrms of other elements, and when his parents first saw the pale blue mana swirling through his eggshell, they mistook it for ice mana, hence her name. She hates being "Cryo the Aquilo" and keeps trying to change her name, but to no avail. Everywhere she goes, no matter what she introduces herself as, somebody catches wind of her original name, and suddenly everyone is using it. She eventually gave up and moved in with a flock of stratoses but just as she was settling in Aeroxeno the asoxeno came slithering up to the nearby mountain's glacier and building a giant spire. Aeroxeno has the name Cryoxeno wants, but he refuses to trade. Cryoxeno has been diving at him out of sheer frustration. Aeroxeno keeps trying to court her, but as he refuses to trade her his name, she refuses to accept him as a mate. Sky Potatoe the stratos teases both of them.