Redditor Murica1776FYeah has seen some genderbent Overwatch Mercy ensembles and decided he wanted to do something different. He wanted his version of Mercy to be more battle damaged and look like it’s survived some fights. He turned to cosplayer Leah Stevo for help, and she crafted the armor and Mercy’s glowing wings. She used EVA foam for the armor pieces and Wonderflex and LEDs for the wings. She says:
More Mercy glowyness + construction stuff: I used warm white LED strip lighting in inside of painted #wonderflex to get the feather effect. The white wing details are all EVA foam. Underlying base structure is PVC pipe and Sintra for stability.
A couple of in-progress photos from Leah Stevo: