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.

Jitter Doll does not like the 'new generation' dragons, as she calls them. Nowadays, dragons seem to socialize with humans, copying some of their behaviour and even allowing the human children to pet them. Jitter Doll hates this behaviour so much that she promised herself to guide the dragons back to their roots. She thought of a flawless plan: kill all the humans. This might not be an easy task, but Jitter Doll devotes her entire life to completing it. Because of her, entire villages are cloaked in blue flames, leaving nothing but ashes. Jitter Doll is the most feared dragon among humans, and the biggest spoilsport among the 'new generation' dragons.