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.

Ebola isn't the most considerate dragon out there. He blusters in and gets what he wants and does what he needs to do with only a modicum of care for the consequences. He tends to be a more hostile sort and isn't seen much by the mostly diurnal dragons of the group. The wyvern also keeps at a distance from everyone due to a combination of not wanting to accidentally infect anyone and disliking invasions of personal space.

Of late he's been accused of killing a previously nameless Waverunner, among others due to the corpses showing horrific damage similar to his prey. This has made him even more bitter and he clings to Korperzerfall, another of the accused.

He doesn't want to see another Waverunner or Undead dragon ever again.