Chameleon

Plot: Frankie Chambers was HYDRA's greatest weapon. Well, second greatest weapon.

Kidnapped by HYDRA as a child because of her abilities, she was brainwashed and trained to be loaded weapon. Her ability to change her appearance at will made her able to slip in and out at ease.

Paired with "The Asset," they were an unstoppable team, until the man that she knew simply as "Soldat," disappeared.

Years later, she's found by none other than Steve Rogers and brought to the Avengers facility. What happens when she's face to face with the man she killed with?

Warnings: language, violence, angst, eventual smut.