Nocturne Dragons are a strange breed. Whenever light strikes their bodies, they are frozen in whatever position they were in. This leaves them vulnerable and they rely on camouflage to keep themselves safe. They are often mistaken for statues when in this frozen state, but Nocturne dragons do not actually turn into stone. Rather, they merely idle until the sun goes down. At night, these dragons come to life, proving themselves to be powerful fliers, although little else is known about their true behavior.

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.

Beethoven's Moonlight Sonata thinks that he just has the best name in the world. It so fits his personality. Through the day, he is scared because the sunlight causes him to freeze in place and he can barely move. But, at night, when the sun goes down, he comes alive and dances in flight under the light of the moon. He likes to do this while listening to the haunting melody he was named for. He likes "pretty shinies" as he calls them and often gifts them to others in his cave. His "pretty shinies" consist of anything from bits of tin, mirrors, coins, and even diamonds. After gifting a white diamond to Pink Carat, she persuaded him to join her quest to find a pink diamond.