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.

Sawna is a very temperamental dragon who can't stand it when things don't go her way. She likes everything to fall into place without any problems or issues. When trouble comes her way, she always vows to destroy whatever caused it. This causes other dragons to be wary around her. They are always worried that she will take something the wrong way and start throwing a tantrum. Even if she realizes she took something the wrong way, she won't apologize. Sawna believes the fault is never hers because people should learn to phrase things in a way that can't be taken wrongly.