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.

After the birth of his Hellhorse daughter, Blue Terror, Visosphere was excommunicated from Baroness Caliagrand's Hellfire pack, due to the Hellhorse offspring's being taken as an abrasion of his loyalty. Visosphere, raised by the Clan and not the Hellfire pack, lacks the hot-tempered ferocity his species is often known for. However, he still acts instinctively subservient to others, leading to a reputation of being a pushover. He lives his days humbly, struggling to fend for himself and for his Hellhorse daughter, though she often doesn't appreciate his care. He considers Patterfriend--Blue Terror's mother--to be his mate, though in reality, Patterfriend is a sassy and independent female who only occasionally visits.