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.

Neilla is busy. She had busy days and busy nights. She has a really cruel personality. Neilla lives in a cave based on the highest tops of Rarja Volcano. She usually stays around the volcano, but she does go to other places on Lucky Island. When the dragons spot her, they hide the hatchlings and eggs behind their backs. This is because Neilla hunts the hatchlings and the eggs and is believed to, well, eat them. She is only friendly to Roden, even though Roden dislikes her. But he sometimes visits her to help her with hunting and to keep her company.