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.

Silent and solitary, Kaihohonu spends most of his time in his own cave somewhere deep beneath the ocean. Every once in a while, however, Kaihohonu will surface in an underground inlet deep within the main cavern to check up on the younger dragons and Elisabeth. He is generally calm, but is willing to fight if absolutely necessary. Mostly, however, he will lead an opponent deeper within the waves until they either give up or are weakened and fall prey to one of the many other ocean creatures.

Despite being mated, Kaihohonu hasn't become any less solitary. He sees Alya only rarely and mainly leaves the care of his children to other dragons.