Nebula Dragons are nocturnal creatures. With the best eyesight to be found, they are often seen staring into space. Each dragon tends to observe a particular nebula and will eventually change their colors and patterns to match it. As the nebula changes over time, the dragon changes with it. The more intricate the design of the nebula, the better chance an individual has of attracting a mate. It is said that the markings on no two Nebula Dragons will be exactly the same.

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.

Heart was one of the dragons to arrive at the clan during the great Fractional Pie Day exodus of 36 AH. On her journey she had met several wonderful humans, like Dimar, but in the end she arrived at Herk's clan and was easily convinced to stay with this ragtag band of chaotic individuals.

When Heart arrived at Dimar's clan during her long and difficult journey, she found that the destruction of pies and pastries had hit the woman and her clan exceptionally badly, with oh so many Sweetlings missing their regular treats. Although Heart would have felt right at home and Dimar would have loved to keep the friendly dragoness around, the wyvern decided to carry on, as to not put any further strain on limited resources. Now living with the dragons befriended by Dimar's beloved Herk, Heart loves nothing more than to fly between clans, carrying love letters, presents, and occasionally one of the humans from one clan to the other.