Who are you

What if the twins weren't the only 1s changed by hydra. What if there was another, a girl, they call her silver streak. Nobody knows what her powers are. She never let them know. But when quick silver meets, and finds her, what will happen? Wanda, had met her before, but never got anything out of her. Quick silver wasn't allowed to meet her. But why? What will happen when he finds her kept in a cage on the lowest floor of their base? Will he help her?