Thunder Dragons are the masters of electricity. Their wings gather energy as they soar through the clouds, and when they clap their wings together they can create devastating arcs of lightning. They can stay airborne nearly indefinitely, landing only to sleep and breed; they catch their prey from the air and take moisture from the clouds. A thunder dragon’s roar is considered to be an omen of misfortune.

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.

Aulus enjoys and appreciates many things in his life, but he never got to enjoy having a voice. Aulus was mute ever since he hatched, forcing him to keep his wisdom and knowledge bottled up all his life. He is also very shy because of his muteness. So he doesn't forget things, Aulus keeps a huge library of everything he learns, filling up several thousands of journals and field guides throughout his life. He rarely strays from his cave, but when he does, it's never to interact with other dragons.