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.

Aka Kasai Nishibi means Red Fire of the West Sun Family, though she is a rejected member of the clan due to her parentage. Other dragons would call her a pure bred, however. She was named this as that is the color of flame she breathes. She is a curious and philosophical dragon who loves hearing stories about any- and everything. She is deeply intrigued by and in love with Akai Honoo.