Balloon Dragons are so named because they are filled with a gas that makes them almost lighter than air, similar to balloons. However, they are not prone to bursting, as they are covered in tough skin and can deflate themselves if necessary. In addition, they generally are slow moving. They use their gas bladders to float to the tops of trees, where food is more abundant. They can shift their weight from their backs to their fronts, allowing them to reach leaves and fruit.

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.

Sheila is quietly pessimistic, but, oddly enough, she's quick to smile—all because Reshio instilled one of his silly beliefs in her head; if someone laughs for five minutes a day, they'll live longer. No one is certain if this is true, but Sheila figure that it can't hurt.

"After all," she replied, when asked about this by the interviewer, "I'm going to die sooner or later. Might as well put it off for a while longer."

Of course, she stops laughing exactly five minutes later—she doesn't want to end up dying of laughter!