Nebula Dragons are nocturnal creatures. With the best eyesight to be found, they are often seen staring into space. Each dragon tends to observe a particular nebula and will eventually change their colors and patterns to match it. As the nebula changes over time, the dragon changes with it. The more intricate the design of the nebula, the better chance an individual has of attracting a mate. It is said that the markings on no two Nebula Dragons will be exactly the same.

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.

Sonata of the Stars is a composer who flies the night sky, gleaning inspiration from the cosmos. He creates songs based on nebulae and constellations, with pace and tone differing because of the stars he sees. His melodies have the power to make the listener see stars in their mind's eye. He once created a high and cold aria based on a cluster of seven blue stars, titling it "Aria of the Seven Siblings". The Aria of Seven Siblings makes listeners think of seven stars in an ethereal dance through the heavens.

Rumour has it that he has composed many more melodies, but the only other known one is the "Birth of Stars", a fast but flowing melody that makes the listener think of stars being born from primordial gases. However, his best friend Cold Mirror swears he has written many more private melodies. Cold Mirror refuses to share any of Sonata's melodies until the composer shares more.