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.

Heaven was raised by hand and shows remarkably little aggression towards her flock-mates- so long as they don't try to steal her food. She even took a mate, Hades, with little fuss. The gossip of the flock is that she chose him because she sees Hades as the only male deadly enough to possibly defeat her if things came to blows. Despite her breed's violent DNA, she is very fond of their daughters—though even they cannot get away with stealing her kills.