Heartstealing Dragons are an unusual breed, named for their mating rituals. These dragons use their long, slender bodies to sneak into both human and dragon holds to steal things over the year. Then, when the right season hits, they give away their entire hoard as gifts, leaving things in the homes of other dragons to attract them. When these gifts are found, however, the recipients can’t always tell who gave the gifts. This receiver often assumes the source of the gift was the original owner, causing them to form friendly bonds with other dragons in the area, spreading peace—and sometimes even sparking love. The only way to know if a gift is from a Heartstealing Dragon is to find one of their wafer-thin scales at the scene.

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.

Seria is a religious dragoness, believing in gods and goddesses -- most heavily believing in a goddess of love, whom she thinks is walking Valkemare as the Arsani named Guila. Seria follows Guila everywhere she goes, praising her and constantly giving her stolen gifts. Guila seems to humor her and uses Seria's idolization of her as an opportunity to give her advice on how to properly do some matchmaking. However, Seria's often too busy planning what to steal next for her idol to listen to her.