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.

Unlikable is actually rather likable, but he's a bit timid and doesn't often take visitors, so he's devised some ways to keep them to a minimum. There are signs near his cave written in five languages warning of a scary, temperamental dragon and one large slab depicting him spewing fire and stomping on tiny stick-figure humans and dragons, all of which he wrote and drew all by himself. When travelers and neighbors don't heed the signs and visit Unlikable anyway, they find a nice dragon who offers them hot tea during their visit and listens to whatever they wish to tell him. He can't help but beam with pride when someone compliments his signs.