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.

Acidicine never had a chance to not be unpleasant. He is somewhat of an outcast in the Dusk Divide Dragon Keep due to his accidental killing of an egg when he was a hatchling. He only didn't know his own strength; he loved curling around the eggs and dreamed of becoming one of the Keep's caretakers. That dream can never be realized now, as the caretakers chase him away from the clutch whenever he nears. Moghsiam the magi takes pity on him and lets him cradle the eggs she teleports in briefly, before they are snatched away.