The amphibious Aranoas inhabit shallow brackish estuaries, rivers and lagoons. Being adept swimmers, they possess tough, vibrant scales that serve to protect the dragon from superficial physical harm, and double as a means to attract mates. Their large, cavernous maws are adapted to swallowing fish whole, and they have powerful limbs to propel them through the water. When mating, males and females will typically vie for the interest of the individual with the brightest scales and the largest dorsal fin. Due to this attraction, they are also prone to collecting shiny and colorful objects that they come across. With a diet primarily comprised of large freshwater or pelagic fish, they often hunt in groups to encircle schools of fish, making for an easier meal. While not very social, Aranoas will often inhabit areas in close proximity to each other should they require assistance in hunting, or to band together to ward off other species who pose a threat to their territory.

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.

Unlike other Aranoa, Threadfin inhabits a freshwater lake with her Water Walker mate, Toad. She gets her fix of salt by going on a bi-weekly trip to the ocean and taking a dip out there. It's odd, but Threadfin is the last one to care about practicality. In fact, Threadfin doesn't give much care to anything. She thinks little of how others see her, what her future holds, or any dangers in the world. She has almost a slow, lazy disposition that does not always serve her well. Even so, she is a surprisingly kind, comforting Aranoa. She takes good care of her family and will openly accept guests to fish with her or just chill out. She doesn't ever search for these opportunities but rather accepts them whenever they present themselves. Just maybe don't steal her fish or do anything with her husband, then an all new side of her reveals itself.