Waterhorse Dragons received their name due to their horse-like physique and endearing behavior. They are capable of surviving out of water, and when on land their skin secretes a gelatinous goo to retain moisture. However, their large paddle feet are better suited for swimming, and waterhorse dragons tend to move very awkwardly when on land. Waterhorses are very friendly dragons and enjoy playing with humans.

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.

Dance in the Ocean, who prefers to be called by her pet name "Prima", is a strange Waterhorse. While still friendly to humans, she seems to prefer spending time with fish, especially koi. She gets her pet name from her odd desire to dance in the water and her graceful movement, like that of a ballerina.

She becomes terribly shy and nervous when out of the water, because she thinks that her awkward stance on land is embarrassing. Because of this, she prefers the air to land, but she will always choose water above everything else. Prima loves to sit in the water and take ideas from nature when she is stuck on a new dance she wants to try.

Her fear of the land has also become somewhat a setback, since the dragons and their caretaker had to relocate their cave somewhere near water. She currently lives in the lake near their cave, in between the cave and the forest that surrounds them.

She is with her friends when not in the water, hovering above the ground. She loves them like a family.