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.

"Sephiroth was, however, extremely pleased with his second dragon, which turned out to be a male Gray Dragon, able to control the weather. Having already begun plotting the destruction of Wutai, Sephiroth named the dragon "Morte Aeterna", meaning "Eternal Death", in hopes of using the dragon as his main weapon. Sephiroth, however, not having finished any Latin course, did not realize that "Morte", in Latin, not only was an incorrect declination of the word "Mors" (correct for "death"), but would have also been a feminine noun, would it be correct. Thus, having named the dragon as such, he made it feel quite insecure with itself, especially in front of other dragons that actually knew Latin (including the Wutai dragon-god, Leviathan), which made fun of "Morte Aeterna" behind its back."

- From "Sephiroth's Stupidest Decisions", a book by Cid Highwind