Deep Sea Dragons, as their name suggests, spend most of their time in the darkest depths of the sea. They have a bioluminescent dorsal spine that serves to attract prey and communicate with their own kind. As with many deep sea animals, they generally eat whatever they can manage to bait. They rarely leave the ocean floor, surfacing only during breeding season. When they do choose to travel to the shallower depths, they avoid bright lights and will only come up far away from shore.

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.

Oceal Jewel, or just Jewel for short, is Sakura Blossom's best friend. They grew up together, and are practically sisters. Saku sometimes asks Jewel for help in decision making within the clan, which makes Jewel kind of like Saku's advisor.

Jewel is a straight-forward thinker, weighing all options before choosing the best one. This doesn't make her indecisive, just thorough. And unlike others of her kind, Jewel does surface quite frequently so she can visit the other dragons in the clan.