Board Thread:General Discussion/@comment-25227952-20150313025357/@comment-4515118-20150313083614

It appears, mostly, to simply be hair. It, like the others' styles, appears to simply match her aesthetic style but still be hair, nonetheless.

It could be a hat or something like a headscarf, but as far as has been seen, it just appears to be hair that matches the rest of her body's sleek, geometric design.