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.

Cloch Na Tine smells horrible and May213 constantly makes him bathe, much to his disappointment. The young Brimstone Dragon has a terrible time keeping himself clean from ash and smoke as he spends his free time rolling in the volcanic islands that reside within his family's territory. He constantly states that his stench keeps away competitors that would take away his hunting area, but his family just states that it keeps everyone within 50 miles stay away from him. Cloch Na Tine does not think this is as funny as the rest of his family as he tries to snap his sharp teeth at them constantly when they make this joke.