Two-Finned Blunas are a very social breed of dragon, living in packs of dragons called “pods.” Blunas are very curious and playful creatures and several dragons in a pod will often “play” with one other, chasing each other around, tossing seaweed back and forth, and riding ocean swells. They are occasionally seen swimming alongside whales and dolphins.

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.

Sennyu, as her name suggests, is often mistaken for a sea nymph, or water spirit. Sailors out at sea often ask for Sennyu's blessing when they see her because they believe she will help them to bring in a good catch, or return home safely at the end of the fishing season. Others mistake her for a dolphin, only to find themselves filled with terror when she bursts forth from the water.

However, despite her intimidating form, she is a very gentle dragon and likes to eat fish, not humans. One of her favorite ways to pass the time is racing alongside dolphins and killer whales to pit her speed against theirs. A playful, fun-loving girl who gives to light to the saying, "Girls just want to have fun!"