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.

Ever since the incident with the pineapples, a window, and poor Citronne's tail, the dragons of Sunfeathers' cave have known to watch out for Uzuki when she's in a bad mood. Unfortunately for everyone around her, they seem to be pretty frequent. However, a Magi has figuratively taken Uzuki under his wing and is generally able to stop her from flying off the handle and going on a berserk spree of uncontrollable destruction every time she gets mad. She considers the Magi, Kariya, a true friend, but feels like he isn't living up to his full potential. Sometimes she thinks that he isn't pursuing his talents because he wants to stay with her, which makes her feel guilty. To remedy this, she strives to rise through the ranks of Sunfeathers' dragons and bring Kariya with her, even if it means dragging him all the way.