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.

Aoiyomi was a dragon that had always dreamed of flying as a hatchling. When he learned that he would never grow wings and his fins grew in, he was crushed. He knew that his ability to move about on land would soon disappear, so he snuck away into a Skywing dragon's nest. After hearing his plea, she accepted him into her nest and often flew him around. He was content with himself by the time he reached adulthood, and dedicated the rest of his life to traveling the world via ocean. He had finally realized that he could always 'fly' through the waters of the world.