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. Ke’maro are a vicious, opportunistic variety of Xenowyrm. They hunt down any prey they see, trapping them with their coils and the soft, fleshy tentacles they keep stored under their skin. Their terrifying appearance and toxic saliva along with their method of hunting and trapping prey has lead to many legends and stories that warn against traveling alone in the vast volcanic wastelands they call home.

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.

After an incident involving a poorly-designed experiment at Seven Questions University exploding, Umbrixeno and Necroxeno got mind-swapped. After the initial shock wore off, Umbrixeno has been quite happy with the results. She loves having tentacles she can play around with, and while the ke'maro body impedes her ability to create general-purpose darkness enchantments, the reputation of ke'maroxenos does an equally-good job of keeping nosy creatures from pestering her for her "hoarded wisdom". She has never been particularly wise (hence her involvement in the experiment that led to the mind-swap). She is afraid that Necroxeno will attempt to return them both to their original bodies, and has been working on a plot every bit as hare-brained as the original experiment that caused the original mind-swap to prevent a reverse mind-swap from occurring.