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.

Filleon is a best friend of Allerion and leaves nearby Allerion's cave, in the valley next to the mountain. Even though he sometimes doesn't understand Allerion's pacifism, Filleon will always help his best friend when the use of magic is needed. As Filleon is a magic user, his body is quite slim as well as Allerion's, people sometimes call these two dragons—Princes of the Mountain (because people normally see them together acting friendly towards each other, they think that Filleon probably lives in the same cave as Allerion).