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.

Nikki is the clans first balloon dragon. At first her clan and their human didn't know what to think of her. She liked to bounce all over the cave. Soutou Aoiro had a hard time making sure Nikki didn't 'bounce' on top of the other hatchlings or eggs in the cave. Now that she is grown, she likes to spend her time in tree tops, presumably eating the fruit off the branches near her. She and Purantan are often to be heard arguing. It seems that he doesn't like her much as she has a tendancy to get into the same tree he's hiding in. Actually he does like her BUT he hates that she spoils his surprises. The other dragons like her too, mostly because when they see her they know Purantan is near and to watch out for his tricks.