Y/n is a girl who was essentially raised by Nick fury and the avengers since the age of 11, she possesses the power of energy absorption. After the battle of New York she went undercover on a mission to infiltrate hydra and their experiments which is when she met Pietro and Wanda Maximoff. She grew very close to them in the year and a half she was there and gained feelings for Pietro which he reciprocated. But one day she had to leave to return to the avengers and it left Pietro heartbroken. They are now seeing each other for the first time since she left and after he felt abandoned. While Pietro tries to be angry at her for leaving, he can’t fight his never ending love for her, whether it be constant tension and flirting or being extremely protective even though she’s technically the enemy.