Dorsal Dragons are so named because they have large fins along their backs that can be raised and lowered at will. They use these fins to regulate body temperature; they raise them to cool off when they become overheated. The bright colors on the fins double as a means of attracting mates.

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.

Arty loves to play games. He likes active games like Hide 'n' Seek. He likes sedate games like backgammon, although he usually has to ask one of the pygmies to move the pieces for him. He likes word games and puns. If it's a game, it's a pretty safe bet that Arty has tried it at least once. He's not a very good loser but has, over time, learned to accept that he can't win them all. The hope of winning is part of what keeps him trying.