Nhiostrife Wyverns are one of the few known breeds of wyvern with more than one set of wings. Because of their four wings, Nhiostrifes are very nimble in the air and control their movements with ease. When it’s mating season, males put on a very beautiful and unique air dance in an attempt to charm a female. The amount of stripes on their wings vary, with more stripes being more attractive, although most have only two to four. Their general attitude is very passive and curious—they only fight if they or their families are in danger.

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.

Yuuki is, like all of her kind, a gentle and curious dragon. Her curiosity was the principal reason by which she met her mate, Zhora, with whom she loves to spend most of her time. She admires the ability that her mate has in casting spells, and how he can turn the simplest spell in the most beautiful things she has ever seen. Yuuki likes to spend her free time, when she isn't with Zhora, flying over the cave that's her home, staring at the other dragons go back and forth. She is still up with trying to convince Zhora to accompany her to fly over other territories away from Gold's domain, to explore and satisfy her always growing curiosity.