Confirmed not to be CG?
That's weird because it looks CG and it's clearly a good step above the rest and the other characters.
Yeah, I thought it was the only piece of CG in the trailer since the dithered hair was completely absent.
Check the shadow quality on her collar when her head is down, and also the shadows on her forehead from the hair in the gif. There's dithering and irregularities when they move, not the smooth soft shadows from their typical CG scenes.
There's also dithering on her eye lashes and polygons on the lower hair strands, especially noticeable when compared to the Agni's Philosophy render.