Bright-Breasted Wyverns are a breed of dragon easily recognized by their bright red markings. They are a small breed, only the size of a full-grown man. However, they have developed poisonous barbs on their feet to make up for their size. Their coloration is used to warn off potential predators of the danger, and is also used to attract mates. They are very social, and can often be seen preening in large groups.

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.

When she was a hatchling, Nyoeru came out of nowhere to take permanent residence in a room which had lime green walls and a bed which vaguely reminded one of a fish. The lady's attempts at reclaiming her room were met with resistance from Nyoeru with squeals of protest and as such, after a while, the lady gave up, allowing the dragon to remain. Eventually, the lady did enjoy Nyoeru's company as Nyoeru enjoyed snuggling to humans (as well as a dragon could) and playing with other creatures besides her fellow dragons. This led to the lady giving Nyoeru the nickname "fluffy" due to her affectionate personality which caught on with the neighbours and visitors. Very soon, whenever Nyoeru flew past, the children would giggle and ask for Nyo the Fluffy to play with them.