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. Umbras are a solitary and generally unwelcoming subspecies found in the deepest and darkest recesses of the jungle. This highly intelligent and cunning wyrm has little fondness for intruders and those seeking them either for their hoarded wisdom or gleaming, crystalline scales. They are content to leave travelers alone, but are not above bringing a swift and harsh end to those that disturb their peace.

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.

Given the kind of reputation her father's breed has, Zetsu has always felt somewhat embarrassed by her mother, who spends most of her time mingling with other dragons and helping decorate their caverns to welcome guests rather than repel them. Admittedly, this disconnect is the reason that Zetsu tends to distance herself from her family, as she doesn't understand how her parents could have ever found anything in common to bond over. All the same, if her father is happy, Zetsu believes that she could be happy too, and she does appreciate that her mother tries to bring her decorations that would suit her lair. It pleases Zetsu to think that when they were courting, her mother was willing to bring her father the cursed trinkets and scary skeletons he adored, without trying to force him into her own aesthetic.