Dark-brown hair streaked with white, skin pure white (maybe?), black wings.
Maybe blue feet? Probably not, but... I want to reference it somehow. Maybe wears blue shoes. Blue stockings?

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Shape:
Shoulder-length hair. Tucks it into shirt to try to keep neck warm.
Stands taller than most women, only barely shorter than the average man. (170.2cm)
Bit chubby around the belly to aid warmth at altitude. (Though mostly relies on thick clothing for this.)
Breasts smaller than expected (a racial thing, so it's average for an avion).
Overall reasonably light, partially due to hollow bones, weighs in well below average. (61.4kg)
Face is subtly furred. (Down feathers.)

Colouration:
Light brown hair with white streaks. (Normal for my family, not a sign of age despite what people think. Our hair thins out, but doesn't go entirely, as we age.)
Dull yellow eyes. (Easily mistaken for light brown.)
Pale skin; think "jade beauty, flawless white". (Might revise)
Dark brown wings, though when given the chance I dye the tips blue.

Clothes:
Thick, tan long-sleeved shirt (with slits for wings).
Thick, tan trousers.
Thick, dark-brown gloves.
Thick, tall, dyed blue boots.

High-altitude gear:
Large, white coat (with slits for wings).
Still has the boots.

Formal gear (not owned):
Long, light-blue dress (with slits for wings).
Small light-blue ribbons tied around particular feathers of the wings. (The placement is very important, has cultural significance. The colouring is personal preference.)
Plain brown sandals. (Footwear is not important, some people go barefoot in formal wear and this is considered slightly more acceptable. Footwear is just allowed because it's useful.)

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Wisknort stands a bit taller than most women, with white skin and large, dark-brown wings crooked behind her. Her light-brown hair, streaked with white, hangs freely to just below her neck. An average face, with tiny hints of fur, frames her dark-brown/yellowish eyes.
She wears a plain, brown shirt and trousers, long and thick, and black gloves. On her feet, she wears tall, blue boots.
While on the move, she carries a stuffed pack with a spear strapped to the side, and a bedroll and tentroll haphazardly strapped above it.