Disclaimer: I do not own Avengers, their characters, plot, etc. I do however own my OC and things added to the plot unless otherwise stated.

Summary: She was brought in from an orphanage and grew up in the facility. They wanted to control her, use her as their weapon; she was too valuable to get rid of even if she was a handful. They wanted to make the most lethal partnership, their most powerful weapons combined. (This is one of those times I suck at summaries.) Bucky/OC, slight Pietro/OC. CA:TWS and AoU

Rated M for Violence, Adult Themes, Language, etc.

The first time he saw her he was being led back to the cryo chamber, he just happened to turn his head to look through a window as a few men led him down a hallway. She was small, still a child with unruly dark hair and bangs that were starting to cover her face. Her limbs, which were strapped to the chair she sat in, looked like twigs as if she wasn't eating enough and her clothes were three sizes too big. She was in the middle of the room in a metal chair that was bolted to the floor. Her head was down, blocking her face even more. Approximately five feet away, a white circle was drawn on the floor around her. A few men in lab coats stood on the other side of the circle with clipboards.

When he first saw her, her hair was long enough to cover down to her nose and her clothes looked to be a size too big. Approximately ten feet away from the metal chair, a white circle was drawn on the floor around her. She was jerking her arms, trying to get free. Her mouth was open but the glass was sound proof. Two of the three men who were leading him back rushed into the room. As they opened the door her screams pierced the air. The two men pointed their guns at her and stared firing as the man that remained with him quickly led him away before he could look inside the window. As he glanced back he saw red splatter onto the glass from inside.

The first time he saw her was after he was woken up from cryo for a mission. He was brought into the room where he would suit up before missions and she was standing there. When he was led in she looked up at him. She had dark circles under her blue eyes that were slightly bloodshot from lack of sleep. She looked younger than him but it was hard to tell. Her hair was down to her lower back and looked tangled and messy. It was out of her face enough that it wasn't a hindrance. She had a similar suit to his but he could tell she didn't like it; she kept pulling at the sleeves and rubbing her arms. He noticed a black collar around her neck with a small square device on the side. She reached up to scratch under it, her fingers went around it and the man who stood beside her cleared his throat. Her hand returned to her side and her face twitched as if she was trying not to frown.

Once he was suited up and ready to go on his mission, one of the men in the room handed him a little black remote.

"She acts up or tries to take that collar off you press this button and hold it until she cooperates. But don't let her die." The Winter Soldier looked over at the young woman who had turned her head to glare at him. "Don't let her wander too far away from you." The soldier nodded. "Here's your target. If we fail you're to take him out." The man showed him a picture. The soldier nodded and looked to the girl who pulled at her suit as she continued to watch him.

Short prologue but I'll be posting another chapter soon.

So I know I shouldn't be starting a new story when I have so many I need to be working on but I haven't done a AoU fic or anything to do with the twins who will be coming in later chapters. OC is gunna be nameless for a few chapters but it's not like I don't know what to pick I have her name picked out already.

Let me know what you think. I have a few chapters finished already so I'll probably post another one soon. If anyone is interested I have another fic that's Steve/OC Bucky/OC (1 OC) "Stand By You"