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. Astrapi are easily the most temperamental of all Xenowyrm subspecies. Their unpredictable behavior—coupled with their masterful control of lightning magic—has the potential for devastating results. Most of their time is spent airborne, flying through the skies or circling mountainsides for prey.

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.

All Astrapi Xenowyrms are known for their unpredictable natures, but Yusano's stems from pure madness. He is constantly wrought with delusions -- sometimes terrifying, always incredibly lucid. Most often he sees monsters swarming out of the darkness to kill him, making his lair a very dangerous place. When one hears lightning exploding on a clear night, it's generally Yusano trying to defend himself from his imagined foes. Though sometimes they're not so imaginary... he has the tendency to distrust everyone even in his rare moments of clarity because they can so easily take on a horrifying facade. He has a few close friends that will stay by his side even as he accuses them of unspeakable things, but for the most part he is alone, lost in his own insanity.