Dark green dragons, once they mature, appear to become an entirely different species. However, this isn’t true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

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.

Adopted by Goldpool as an abandoned egg, Petaltooth grew up a self-absorbed and self-pitying dragon, despite his adopted family's attempts to cure him. Most of the dragons despised him for his pathetic behavior, but Fyreflye, the most hyperactive and optimistic dragon, took pity on him and helped him to see the better side of life. Since then, they have been mates.

Since he became happier about his life, Petaltooth has taken to restoring the forests, something which he enjoys and finds great meaning in.