Magi Dragons are, as their name suggests, primarily magic users. They rarely use physical forms of attack. They eat anything they can kill, which is almost everything. They won’t kill unprovoked except when hunting, although they may kill humans if in danger. Their strong magic makes them one of the most feared breeds of dragons.

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.

Of all of Delirium's students Sheldon is the most brilliant. At least that's what he will tell anyone who asks him, and even those who don't actually. He can be obnoxious and loud and inconsiderate of any other dragon's feelings—and most of the times he is—but sometimes he also can be very, very brilliant.

Most of the other students refuse to work or even talk to him because of his bad manners and he prefers it that way, claiming that they would only hold him back. The only fellow student who doesn't seem to mind is Onna who seems to think him no more strange than any of the other dragons around her.