That is an awesome belt, Gryffin. I have this strange attraction to hip belts with chain/link detail - I think because medieval maidens always wear some sort of low-slung girdle like that across the hips of their splendid gowns. Not sure that an hourglass/pear should be wearing that style, but I digress.
I can't think of a lynchpin for myself, either. Belts are almost that, but I can be happy in some belt-less outfits. I'd say hair, but I vary the styles from updos to pretend-bob to long & flowing, so not that either. Brown? Haha.