Dorsal Dragons are so named because they have large fins along their backs that can be raised and lowered at will. They use these fins to regulate body temperature; they raise them to cool off when they become overheated. The bright colors on the fins double as a means of attracting mates.

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.

ND is a very, very sick dragon. Born in a food shortage on the Republicator Territories, he was so undernourished when he was a hatchling that he became very sick, and almost died. Something kept him alive, though--something that none of the other dragons could explain. Ever since the day he returned to normal, though, he has had problems.

He has severe illnesses, some of which were rumored to be potentially deadly. Surprisingly, though, ND doesn't even seem to mind, almost as if he has become used to it. Some dragons say that he is actually a Neglected. Others say that he was a Neglected hatchling at one point.

The truth--ND was an experiment of the psychotic dragon, GLaDOS, who resides in Aperture Canyons. He managed to escape her labs, but not before accidentally stepping into a magic trap that the female had placed...