Avengers

Please do one with the infinity stones

Backstory idea: y/n was a nurse/soldier in Bucky and Steve's military squad during the war, and their childhood friend, but during a mission, Y/n fell off a cliff and was never seen again, and assumed to be dead. HYDRA found Y/n and turned Y/n into a brainwashed weapon and erased Y/n's memories of everything beforehand, as a backup plan if winter soldier project backfires(This is after Bucky got free of HYDRA).