Y/n is a 23 year old Hydra prisoner. She’s been in a cell for her entire life while Hydra experimented on her. They gave her a serum. Not exactly the Super-Soldier serum, but it made her really strong. One day, the Avengers rescues her. Y/n doesn’t really know how to behave in real life, and she’s kind of what people would call a weirdo. But despite that, The Avengers still like her. One of them even loves her. Bucky.