Hellfire Wyverns are so named for their foul tempers and fiery visages. Their social structure places all females above all males, due to superior physical characteristics and violent dispositions. Forced subservience of the males causes them to become vicious, petty, antisocial, and passive-aggressive compared to the aggressive and social females. However, orphaned hatchlings raised by foster parents of another species can develop surprisingly even tempers and mellow dispositions, proving that their defining unpleasant nature is, in fact, a learned behavior.

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.

Because he was raised from an egg by his human tamer, this Hellfire Wyvern has a far more gentle personality than most of his kind. His brilliantly fiery plumage gave him the name "Diablo of the Burning Lake", but in fact he has quite an inquisitive and calm personality, unlike most of his kind. Whenever he comes in contact with another Hellfire, however, he turns defensive and arches his back with a wicked snarl. His tamer has to be extra cautious around this dragon, as sometimes he will spout fire purely out of surprise or shock. On more than one occasion, he nearly set his tamer on fire. Regardless, he is more of a loner than most the other dragons and prefers hunting to socializing.