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.

Nishiakari Yuushi's roughly translates to "twilight wanderer."  He has given in to his mate's demands that they settle in the humans' resort area, but when the sun is fully set he indulges his desire to explore and travel, either with or without his mate.  The first pink hues on the horizon usually find him winging home from some adventure, sometimes bearing fantastic treasures he discovered in his wanderings.  Occasionally he and Sayo will disappear for days at a time and return adorned in jewels and trinkets from distant lands.  It is widely whispered at such times that they enjoy dancing and the adoration it brings so much that they leave to find a new audience for a time.