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.

"Ryuushousei Purple No Esme" or "Dragon Female Star, Esme of Purple" is a gentle and nice dragon who does not mind listening to other's trouble. She often helps wounded travellers, providing them some food and nursing them until they are able to move again. Due to her kindness, she is loved by several dragons and also by humans, suiting her name, which means "esteemed" or "loved".