Hellhorse Dragons are foul-tempered, spirited creatures with tempestuous and violent dispositions. Torrents of scorching flames erupt from their bodies and can easily set their surroundings ablaze. Highly aggressive and territorial toward other dragon species, Hellhorses will tolerate others as long as they believe the association to be beneficial. Such alliances are tenuous in nature and frequently short-lived, as the slightest disagreement can easily escalate into a full-out brawl.

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.

Unlike her older sisters, Firehose wants to be as destructive as possible. She is a disappointment to her father as well because she does not believe their lineage can be traced back to the primal fire spirit. Her mother considers her a disappointment because she is not particularly clever about anything. All Firehose wants to do is light things on fire. Her favourite thing to burn is books, which she insists are "evil time-suckers". Sometimes other pyromaniacs join up with her, but since her conversations all center around fire, incineration, and conflagrations, they tend to get bored of her company quickly. Her rage at this abandonment leads her to fixate on obliterating things even more.