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 a different type of mana, making them powerful magic users. Thalassas are a unique variety of Xenowyrm in that they are the only subspecies known to dwell in marine environments. Their porous skin and slender build are perfectly suited for the aquatic terrain, but they can only survive for short periods of time on land. Powerful users of water magic, they can create large waves and alter currents with a simple thought.

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.

"I used to be conceited" was not this fellow's given name at birth, but over many years, his current nickname stuck. If asked about it, he would explain that true to his name, he is not conceited. At all. He's the most modest Xenowyrm—no, the most modest dragon. Nobody is humbler, and that's something he's happy to share. Of course, I used to be conceited has flaws: he's a perfectionist and tries his best to get things right; sometimes, he works too hard making sure everything is accurate and nice; he worries a lot about how he can maintain his relationship with so many friends; and so on. He has room for improvement.