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.

Casiana has an interesting role in her group. The closest term to describe what she does would be a barkeeper and counselor. She has all the others' favourite drinks memorized, even Cruornus' extravagant taste in blood. Also, whenever one of them is having problems, either emotionally or physically, she is always right there to help out. Casiana thinks of herself as the big sister of everyone in her group, and acts as such when around them. She has a fierce spirit and a kind heart, and will always be there whenever one of her friends needs her.