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.

Queen of her brood, Joanna of Castile is known for her moody and irritable temperament and jealous behavior. She frequently rages at her mate, Philip of Castile I, threatening him with her blue-hot fire if he so much as glances at another female dragon. She has been known to attack other females if they come anywhere near her mate and once scorched the wings off a nebula who happened to be soaking in the starlight of its favored nebula simply because Philip I was hunting nearby. Her entire clan lives in terror of her reckless temperament. Her unstable mentality has been passed down through the generations and magnified through successive generations of inbreeding.