Storm Dragons are the masters of the skies. They are excellent fliers and land only to rest and eat. In addition, they have full control of the weather. They are very hot-tempered and easily angered. They will attack any human that bothers them, conjuring strong winds and dangerous lightning.

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.

Isabelle is rash and fun-loving. She doesn't really think before she acts, and she can come off as abrasive to those who don't know her. She's very close to Jace, Clary, Alec, and Simon, but her reckless personality has earned her quite a few more friends than that. She's a fighter at heart, and she's a force to be reckoned with in times of battle—she moves with the speed of lightning and the grace of rain.