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.

The only female tinsel of her lineage, Argentia's birth was, to say the least, an extremely unusual phenomenon. No one quite knows why she is the only female of her family; whether it was the weather that night, or simply a hiccup in the lineage. However, this only makes her even more special and unique to Watari. Argentia is graceful, yet subdued and self-conscious. Like others, she is very fond of Artemis, but the two share a special friendship due to their rare metallic coloration. Her name comes from the Latin word for silver; 'argentum'.