Has she thought about hair spirals? My understanding is that they're a Nordic invention, but that could be incorrect. Anywho, they're a small spiral of metal (which of
course can be flat and embossed, round, heavy wire, plain, beaded, etc, but are best made from a half or dead-hard metal, or carved from
wood or bone), and they're used to spiral the hair into, to keep it out of your face, yet hanging down. I've made a few of heavy copper wire, with beaded dangles... I'll see if I can find some pics of what I'm talking about, to see if the idea might interest her, because I think they'd be right up her alley. (Edited to add: here's a wire-wrapped one;
https://www.etsy.com/listing/1183322897/metal-hair-accessories-silver-copper-or?gpla=1&gao=1&=&utm_custom1=_k_10f8ca5930d017bf9b5ea970ccef9837_k_&utm_custom2=319339185&msclkid=10f8ca5930d017bf9b5ea970ccef9837)