I don’t think this can be said forcefully enough: Sansa’s plotline this season is not about empowerment. It’s about the idea of empowerment being used to manipulate her, while she continues to be a victim of an incredibly dangerous situation.
Yes, there’s something intriguing about the moment she meets Roose Bolton, when she visibly hides her feelings and switches on her courtesies. And yes, there are hints of a rebellion in Sansa’s favor, especially in the servant’s comment that “the North remembers.” But she’s still a victim, still a pawn, just under a different guise.
No one can claim that Sansa’s decision to marry Ramsay Bolton was an empowered one. We can hardly claim that it’s a decision at all. Her pure hatred of the Boltons is clear the moment she states that “the Boltons have Winterfell,” and that hate turns into panic and grief the moment she realizes what Littlefinger has planned for her — another alliance with people who killed her family, another marriage against her will. Even with her ignorance about Ramsay Bolton’s sadistic nature, she has every reason to completely refuse to ally herself with them. And she does, fiercely, desperately. She will refuse to go, she will starve herself, she will die before she takes another step toward that castle that’s no longer her home. And although she cries, although she’s not crafty or manipulative or any of those other things that players of the game of thrones need to be, she does show strength here. A determination to express herself, defiance, self-preservation… she knows what she’s willing to do and she will fight to stop anyone from taking advantage of her again.
And then Littlefinger takes advantage of her. Not because she’s weak, but because he uses the very idea of strength and empowerment against her. People have been calling Sansa Stark weak and taking advantage of her ever since her father was arrested, and now here is somebody telling her she can be strong, someone telling her that she should want revenge, and seeming to present the perfect way for her to get it. When Littlefinger tells her that he won’t force her to marry Ramsay, that they will turn around as soon as she says the word, he creates the illusion of choice necessary for Sansa to feel that this marriage might be “empowerment,” and then he twists her feelings back on themselves, so that standing up for herself isn’t strength but weakness. It’s weak to run. It’s weak to weep, to be “a bystander to tragedy.” It’s strong to agree to Littlefinger’s plan and be married into a family that killed almost everyone she loved.