They are quadrupedal in nature. Four stilted legs are constructed much like an antelope's, spindly and awkwardly jointed, terminating in keratin hooves that are hard only on the pad that touches the ground. The rest is soft downy, blending from the thicker fluff that descends from their main body.

Two large wings, roughly 15 feet individually, and a long, body-length trail of a tail are both tipped with a darker indigo line, as well as a mask descending to cover its four white, pupilless eyes. Across their back and wings- and the rest of the body, though it doesn't show prominently there- is an ever-shifting web of cells, designed to manufacture vitamin from the cave lights. The movement gives it the impression of light dancing off of the surface of water.

Oddly, however, it looks like they have no mouth. Nothing opens when they speak, with their voice coming through twinned bronchial tubes, both acting as rudimentary lungs and gills that pump air or water through them to breathe and smell. Where a mouth should be is simple feathers.

Their true mouth is above their eyes. A long, ever-growing crest marks the beginning of their mouth, opening with two tentacle-like appendages that rely on twin hydrostatic skeletal structures. Ridged teeth act as a zipper to keep the mouth closed. When open, however, it splits their neck down to their shoulders, both ends wildly flexible and able to whip around at deadly speeds.

This, of course, leaves room for complications with their internal organs. Instead of a brain encased with a skull, it sits nestled behind the breastbone and near the 'lungs', protected by a skull-like structure embedded into a warped ribcage. Their crest- its calcium fueled by its watery marking- may break and repair itself, consistently growing nearly a foot every cycle if it's not ground down or sharpened. While its bones may be hollow to allow for flight, Isolde's crest is solid and packs a punch, capable of withstanding hits with its enamel surface. A long tongue, tied to a carnivorous digestive system, is long enough to clean the entirety of Isolde's crest, and helps with wound recoveries or crest breakage.

Their gem rests nestled between the two intake openings of Isolde's chest, attached to their large keel. While comparatively small, it's a large pink opal, faintly colored with a pinkish hue.

Isolde may be young and may be inexperienced, but they certainly know how to intimidate.

With a cold demeanor, the hybrid is one to put themselves in charge, giving others a harsh eye until they fall into line. They're willing to play others games for some time if it means they may find something out of it- otherwise, they either desert it or eliminate whatever threat they face.

They aren't one to feel about these things. They haven't learned about that yet- perhaps, in the future, they may, but for now they simply don't understand why they shouldn't tell people what to do. Don't they know what's best?

That being said, they don't go out of their way to control people's lives. They prefer to keep their sphere of influence small, but they want to make sure that sphere is pristine and perfect, finding comfort in things being right.

While they certainly aren't afraid of fighting or killing, they abhor making it messy, preferring to keeping things quick. Talking seems to be easier, though. They don't need to be liked, but if they keep people amicable about them, then their life certainly won't be in that much danger.

With the lack of much change in their spiracles, Isolde often holds a monotonous, robotic-like tone to their voice, emotion being hard for them to express.