This one was a toughie, it was hard to find any information about the most crucial parts of her outfit, the armour. Whilst the shield is basically just a round object splattered in paint, her armour is layer of layer after layer. Like an onion, it have layer.
Beneath her onion exterior we have a much plainer outfit, we keep the wrapped legs, and she wears a plain golden brown peasent top. She wears a red wrap, which is occasionally visible when wearing the armour, over a long animal pelt skirt. Which isn’t truly a skirt, if you know what I mean. Four black dots (buttons?) are visible down the centre of the red wrap. For what, I don’t know. It looks nice, let’s leave it at that.
It appears that there is a second layer to the armour. You have the blue spattered front, and that plain chest armour. Perhaps it’s just an extra piece you can slap on for extra protection. How you choose to make it is up to you. The armour appears to be folded on top of each other, or rather, layered over each new piece. It features a chest and back piece as well as shoulder armour, arm wraps complete with claws and leg wraps. These leg wraps also come with black spikes.
To complete the outfit is the helmet, like a paper mache’d helmet with antlers, it’s mostly blue with a few yellow stripes further up, the eyes are shielded, possible with fabric. Giving Valka an inhuman appearence. A large belt is worn on her middle, perhaps to keep the outfit together. She carries a long double ended staff and her shield. The staff end both in hooks, which becomes clear as to why during the movie.
Her hair is freakisly long. It’s past her waist and probably a mix of loose hair and braids tied with red fabric, leather or ribbon. The same kind is wrapped around her staff.
Tutorials: Armour 1, 2, 3, 4, 5, 6, 7, 8, 9.
Clothes: 1, 2, 3, 4, 5, 6, 7.
You may find Astrid’s refs as some help to you.
This is the best I could do with what I had. Hope it helps someone!