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.

Nar Juri is Haruka's mate and closest confidant. Very protective of her children Juri has worked hard to ensure that they have grown up happy and healthy, not allowing them to leave the safety of her sight until they matured.

Juri has something of a rivalry with Mamon, whom has expressed an interest in her family and their desire to keep the bloodline pure. Afraid that he might do something to hurt one of the hatchlings, she keeps a watchful eye on him whenever he draws too near her nest.