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.

Yasurai, like most Gray Dragons, is quite touchy and moody most of the time. He prefers to keep to himself and though he's not quick to attack, he will if you annoy him too much. Most people are scared away before that happens, though, for Yasurai is quite generous with his roars. Every once in a while he joins Takeda on one of his strolls through nature, despite them being two totally different types of dragons. Yasurai has a soft spot for Fuyushiro and tends to be quite the jealous partner.