Sunset Dragons are closely related to sunrise dragons. However, their behaviors differ greatly. Sunset Dragons generally live alone or in small packs. They are more active in the evening, hunting and performing all of their daily tasks as the sun sets.

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.

Persia Of The Moon is a basically hostile dragon, leader of SteelClan, an unofficial tribe of dragons formed by rebels of Bloodclan. This is how he became leader. One day, much to both Berlin's and Stelll's anger, he confronted Stelll about the "sign" that their ancestors sent the tribe, and that ended up making Berlin leader. At a meeting, he interrupted Berlin, and said: "Isn't it a coincidence that Stelll made Berlin leader when Berlin saved him, or am I wrong." This caused confusion in the tribe, and Persia declared that he would no longer follow Berlin. Then, along with a large group of dragons, he formed a new tribe named "SteelClan." He attacks daily, and it is only a matter of time before he kills Berlin and takes over Bloodclan entirely. During attacks on BloodClan, he is often seen with his mate, crushing eggs and killing hatchlings in BloodClan's nursery, leaving Berlin The Silver to his children.