Jester Dragons are a pleasant, agreeable breed of dragon known for their striking colors and springy, playful-looking way of moving. Jesters are light on their feet and almost look like they’re dancing from place to place, making them rather fun to watch, but this is simply their natural tendency. Jesters are drawn to excitement and noise, and to dragons and even humans with natural leadership skills. A Jester’s heads tend to get along quite well and are good at recovering from actual conflict, though the black-masked head is generally witty and a bit snarky, and the white-masked head is typically more cheerful and good-natured. Their light-hearted bickering is often cited as an inspiration for comedic writing. Jesters are far from defenseless, though: if actually threatened, they have a very toxic venomous bite, and they are perceptive dragons despite their apparent playfulness. It is thought that their bright, sharply-contrasting colors are aposematic, to warn potential predators of their venom.

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.

Two-headed dragons are unique enough to deserve a separate classification from ordinary dragons. They have two necks, two brains, two mouths, but one stomach and one main body. The two heads usually work together, but there are times when they will fight each other, snapping back and forth. Their unique anatomy prevents them from breeding with single-headed dragons.

The Valkemarian New Year's party that led to Knave and Fool's egg was the first and last time their mother tried an pangalactic gargleblaster. They caused her a lot of trouble growing up, starting in grade school when they adopted the names they are known by today. Knave is the more observant head, and he was the one to notice how their mother—the light head, Depris, especially—worried. Fool convinced Knave they should head into the mountains and ask the aeons for help. Reeku peered back in time and gave them Li and Eightil's names. The innkeeper had a poor memory of that party, too, but regretted his conduct and offered to pay child support.

As a comedian, Knave and Fool are constantly on the move for new venues in which to perform. They regularly stop by Nworset because the city is a good venue, and visit their father while there. They stop by Lloyprij to see their mother often as well, though their hometown is too small to be worth it for them financially.