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.

Mister Ares Balloon is obviously a balloon dragon. While his last name is obvious, his first name can be interpreted as god of war. To the other dragons in the cave he's called the god of balloon war, for one sole purpose. He's the only balloon to be found and is usually thrown around during a wild party. However he gets a lot of "apology" food later, so he doesn't mind too much unless of course he gets hit really hard.