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.

Rum Fog is one of those dragons who prefer to meddle with human affairs more than pursue traditional roles inside the clan. Being a jungle-dweller, he often found himself wandering near liquor-producing establishments—this coincidence led to curiosity, then to helping a little the humans managing the distillery, and lastly bloomed into a full-fledged collaboration with them to manage the liquor production. He always smells like oak and sweets and a bit like alcohol, and this originated his name.