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.

Ptero-Lea is the patriarch of Pteprocks' Clan. He and the clan's founder, a human squire, fled from a warmongering village to the island of Dactyl. When the village threatened to invade, together Lea and the squire formed a small army of dragons, which successfully fended off the village's soldiers. When the fighting was finished, the dragons all settled on the island, and became the first members of Pteprocks' Clan.

Following this, Lea was given leadership of the clan, with the squire and his descendants acting as human proprietors. When one of the proprietors died, however, and the clan was launched into civil war, Lea ultimately lost his position as leader. Eventually, he was able to find a new proprietor, a young mage, and one day they hope to reclaim what is Lea's rightful position, as an elder. This is demonstrated by the fact that he still refrains from having children, as is the custom, so he will still be able to focus on leading once he regains his post.