It was previously believed that purple dragons were exclusively female, but this is not the case. Recent environmental shifts have revealed the existence of both genders of this breed. Female behavior is well known; they are primarily herbivores but will eat meat during mating season. On the other hand, very little is known about the behavior and habits of male purple 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.

Shichirou resides with Damian's Island Clan and does whatever he can to stay out of their conflict against the Crater Clan. His main interest lies in hatchling development and nurturing. He takes great pride in his tried-and-true hatchling curriculum, which comprehensively covers all manner of subjects in order for every one of the Island Clan's children to become constructive, knowledgeable adults in a world where conflict is inevitable. Despite this, he does not have any apparent desire to have hatchlings of his own, believing that teaching his own offspring would interfere with his ability to be objective and inclusive.