Each Fever Wyvern carries a unique and very deadly disease on the spines of its tail. To make up for a lack of physical strength, the dragons use this disease to their advantage by poisoning prey and fending off attackers. The illness will quickly render victims helpless before eventually killing them. A Fever will track its prey until the target can no longer move. Usually a solitary breed, these dragons will only come together during mating season, and will flare out the brightly colored sails along their wings to help attract potential mates. Although it has been observed that the wyverns are nocturnal, they will often pick an open spot of sunshine to curl up in and sleep as the day passes by.

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.

"I am disgusting."

Phemura is considered repulsive by her entire clan. No matter where she goes or whom she encounters, her fellow dragons regard her as a rotting corpse that can move, a piece of trash polluting the environment, or something else to that effect. As a result, she has no friends, and everyone avoids her as much as they can. However, she doesn't mind being seen this way. In fact, she seems to enjoy her repugnant reputation, wearing it as a status symbol. Calling her "ugly" makes her smile, and describing how "foul", "nauseating", or "vile" she is will brighten her day tenfold. Fortunately for her, Phemura's pride in being "disgusting" incites even more degrading comments. She doesn't understand how she came to be like this, and quite frankly, she doesn't really care. All that matters is that she keeps this revolting persona forever. All she wants is an eternity of hatred and decay. Maybe the constant torment warped her mind, but no one can say for sure. How disgusting.