Brimstone Dragons live in dry arid areas such as deserts where they feed mainly on sheep, goats and the occasional camel. Their favorite habitat is ideally situated close to the wastelands around active volcanoes. This is due to an important part of their diet—sulfur, which they obtain from deposits near volcanic gas vents. Instead of fire, these dragons use the sulfur they ingest to create a noxious gas which they store in their large throat pouches. When in danger, this gas is released in a large cloud. They also eat other mineral rich substances—including charcoal—and will drink the mineral rich (but slightly acidic) water commonly found in deserts and volcanic regions.

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.

The Sky's Butt Is Feet spends a lot of time planning excursions to find more objects for her hoard but seldom carries any of them out. In fact, some neighbors have found that she frequently gives what gold and jewels she has away willy-nilly once she's decided their presence isn't welcome. A relatively new addition to the region, she speaks the same language as the other dragons but uses a lot of unfamiliar phrases, such as describing her grandmother as "full of beans" and remarking that a neighbor is adding legs to a drawing of a serpent.