After being kidnapped and tortured by Hydra on a mission, Y/n is reminded of repressed childhood trauma and suffers from PTSD and panic attacks. Bucky Barnes is reminded of his own trauma and decides to help Y/n cope, but finds himself falling for her in the process. Y/n is 22 years old, and has the ability to manipulate how light, sound and forces interact with the cells in her body (basically she can turn invisible and packs a hard punch)