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.

Sierra is as hot-headed as they come. She'll never back down from a fight, even one that will likely leave her injured for days. Not only does she rashly challenge dragons many times her size and might, she also isn't afraid to play dirty. The other dragons do find her a bit hard to get along with but manage to tolerate her constant displays of aggression. Besides, they can always send Taloss to calm her down if things get too out of hand. He's the only one Sierra listens to, even if she does pretend to dislike him.