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.

Some say that evil is born, others blame nature. Vesta, on the other hand, doesn't care. To her, "evil" are just dragons competent enough to fend for themselves and rely on their own strengths. Everyone else are weaklings. If one ever crosses her path, then may their souls rest in peace. Vesta will not stop her assault until that poor soul is thoroughly dead. No one likes the fact she commands everyone to her liking, but who is going to stop her. She strikes fear in the strongest of warriors. The other vicious breeds plan to use her brute force to be in charge. Even Forsaken Angel Felix, the only dragon parallel to her in strength, stays away. Luckily the elder of the cave, Messender of Thoth, knows her Achilles' heel—her need for attention.