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.

Sundown is always seen at sunset, hence his name. He will glide over villages and kidnap people from their homes and keep them in his cave, which is next to Cream Suprise's cave.

Sundown will force them to entertain him. If they refuse, they become his lunch. But even those who entertain him don't live. After getting bored, he will either eat the person or let them free. But, it is extremely rare for him to release a person from his cave. Only people who are good entertainers get to leave Sundown's cave.