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.

Eyirla is an intelligent, enterprising Wyvern. As a hatchling, she spent a great deal of time wandering through human marketplaces, marveling at the various things for sale. When she grew older, she left the human cities in favor of life among other dragons. Feeling slightly homesick for the busy markets, she set up a small bartering stand of her own using her knowledge of plants and herbs. To her surprise, the stand (located in an easily accessible bay) quickly became popular among the neighboring dragons, and it began attracting dragons from all over the Cave. The bay soon became known as Eyirla Bay, though visiting dragons stumbled over the pronunciation of her name, often shortening it to just "E". As her customer base expanded, so did her wares. Eyirla began selling things on behalf of other dragons, as well as continuing to stock her herbs. Her stand carries a wide variety of items, and she proudly tells her searching customers that whatever it is, they can get it at E-bay.