Swallowtail Dragons are graceful and quick flyers, much like their namesake bird. They are capable of precise aerial acrobatics, and can reach very high altitudes. Because of this, humans observing these dragons are often astonished at how large they are when confronted up close. A Swallowtail’s diet consists of insects and small mammals plentiful in temperate forests. These dragons are also made remarkable by their paper-thin wing membranes, which allow light to pass through, creating an astonishing effect on starry nights.

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.

Grace is Martin's most frequent flying partner. They make a pretty couple in the air, but, as with fellow performers Silcu and Sora Skydance, their relationship is strictly professional. Grace is overshadowed slightly by her more colorful partner, but her talent is as great as his, even if few other dragons seem to recognize that. She doesn't mind that Martin is more famous than she will ever be, as she likes to be able to fly beyond the limits of Roaring Lion Productions without being mobbed by a group of avid fans.