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.

Breathing fire is Breathfire's favourite thing to do (hence the name). He enjoys it so much that he has challenged others to see how wll they can breathe fire and every challenge he could breathe it better. Although sometimes he gets carried away and ends up burning his friends and (very rarely though) himself. He does love other things too like flying and he does do it only not as much. Although weirdly enough he only catches prey from the sky not the ground and doesn't use his fire. The reason why he doesn't use his fire ever to catch his prey will remain a mystery.