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.

Due to her aggressive personality, she has been given the Gaelic name "Kelley". Her epithet "Ryuudosei", meaning "Dragon Angered Star", also shows that she has a short temper.

Although she likes to be in a group and to hang around with the other dragons in her scroll, she sometimes acts too tomboyish, causing that other females fear her. She takes everything very seriously and gets offended very easily. If someone dares to insult her, she will become very aggressive and use violence to solve the problem.

Her flame is unique. If she burns someone, the body of her victim will not be reduced to ash, but to ice dust.