Aria dragons are a brightly-colored and sprightly breed, perhaps most adored for their lyric calls. Their song-like melodies fill the areas they inhabit; their coos resemble those of birds, only more elegant and refined. They have fairly strong magical capabilities, but tend to reserve these strengths for last-minute defense, choosing to live their lives in simple peace. Arias, sticking to the tropics, typically live quite far from human settlements, giving rise to the previously held belief that they had gone extinct.

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.

Roseline was initially thought to be a female and given a feminine name, which he doesn't mind. This friendly dragon lives in a makeshift den crafted from flower-filled wreathes and woven vines, which sits over a silver stream trickling down from the mountains. He is very grateful to have company, but though he's very nice, he tends to forget that other dragon species have different customs to himself and often makes the mistake of treating others like he would a fellow Aria.