I'd strongly recommend using muslin to make feather's or even perhaps going so far as making it out of paper. Real feathers are a pain the butt to make andd even more so to maintain.
You could essentially use card board to form the wings and then paste paper on it to however you like. I think using the paper method, you'd be able to use a wire coat hanger and then velcro strap it to a bra. I'd highly recommend the velcro you'd find in hardware stores as those can really handle wait and stress fairly well.
RWBY: Blake Belladonna - Gambol Shroud FUNCTIONAL
Planned Cosplay 2017
- Everything all gold, woo!
Gilgamesh [Fate Series]
Kayle - The Judicator [League of Legends]
Sagitarrius Aiolis [Saint Seiya]
Genji [Overwatch - Ocre]
Geralt [Witcher 3 - Wolven]