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.

Tondra is a fierce dragoness with a fiery personality. Although they are of the same species, she does not get along well with Malador. Despite their differences, both are members of the Storm pack, a group of Gray, Thunder, and Lightning dragons who live closely with each other, within Watari's cave. She can often be seen soaring through stormy night skies with the rest of her pack in tow. Tondra means 'like thunder' in Esperanto.