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.

Run-On Sentence is difficult to understand; he constantly prattles on and on and on and on about anything and everything under the sun even if the topics aren't related—dragons can get caught listening to Run-On for hours as he flies with them or hovers near them, seemingly switching subjects every few minutes and never giving time for listeners to reply. Nobody quite knows how he has energy to fly around all day constantly chatting the ear off anybody he can catch; as a result, he is, unsurprisingly, often found alone, as dragons partake in an impromptu game of hide-and-seek when they hear him nearing their location. Run-On Sentence's only redeeming quality is his love of potatoes. Well, his owner believes this to be a redeeming quality, anyway; the other dragons in the clan don't quite agree.