(If you're reading this, it's not too late: Game of Thrones spoilers are down below. Escape while you can.)
As Game of Thrones hurtles toward the finale of season 7, theories on the fate of Westeros are swarming nonstop. The most recent predictions focus on pretty much everyone, from Bran Stark and his possible secret identity, to Jon Snow and Daenerys Targaryen's potential future together (which could or could not be gross, up to you.)
One of the latest theories involves Arya and Sansa Stark. While the director of the most recent episode, Alan Taylor, alluded to a "violent" confrontation between the sisters, some Thrones fans aren't so easily convinced that they're against each other. Ideas have sprouted up on the Reddit page dedicated to GoT, and one user thinks Arya and Sansa are not fighting, but protecting each other and plotting to take out the devious slimeball Littlefinger. Redditor ScienceMuddafucka (fire screen name alert) provided a breakdown of why exactly it makes sense that the Stark sisters are in secret cahoots.
Foreshadowing: We have quotes from as far back as S6 suggesting that Arya will protect Sansa.
"No one can protect me." – Sansa, S6E9
"You need better guards." – Arya to Sansa, S7E4
Protecting each other: After LF suggests Sansa use Brienne to intervene in the Arya-Sansa catfight, Sansa sends Brienne away and says that she has trusted guards here already. Sansa is not afraid of Arya, nor Littlefinger, and she doesn't want the honorable Brienne involved in their lying and schemes.
Arya is trained in stealth: Arya was trained by assassins. She is far too stealthy to let LF know that he is being followed, unless she did this deliberately. In S7E4, Arya walks onto Brienne and Pod sparring just as Brienne says, "Don't go where your enemy leads you." In S7E6, the directors deliberately show us Sansa opening and closing a very squeaky door as she goes into Arya's bedchamber. Yet Arya is able to sneak up on Sansa without a single noise.
Staged fights: When Arya confronts Sansa about the Northern lords talking badly about Jon in S7E5, the door is wide open. Similarly, when Arya confronts Sansa about the letter from S1, Arya projects her voice just as she is reading the letter. It's almost as if they want someone to hear their fights.
The Game of Faces: In what seems to be the most psychotic Arya scene, Arya basically threatens to cut off Sansa's face and pretend to be her. The entire scene is Arya playing the Game of Faces, presenting lies as truths. She even says that they are playing! She plays this game when she tells Sansa that she remembers Sansa standing on Ned's execution stage – Sansa fought and screamed, and Arya knows this. Arya played the game when she told Sansa she would never serve the Lannisters – Arya served as Tywin's cupbearer. Arya tells Sansa she wonders what it would be like to wear her face and her pretty dresses, to be Lady of Winterfell – we are beaten over the head since S1 that Arya HAS NEVER WANTED ANY OF THESE THINGS. Arya is playing the game of faces, and when she realizes Sansa hasn't caught on to her lies, she hands her Littlefinger's dagger, symbolically saying, "I trust you and want you to protect yourself from LF's lies."
The third eye: Do we really think there hasn't been a single off-script scene where Bran tells them, "Hey, uh, LF kinda started the war of the Five Kings by lying about this dagger, betrayed our father, and is essentially the reason our whole family is dead." We hear crows when LF comes out of the crypts with Jon, when Arya enters LF's bedchambers, and again when LF and Sansa are talking in S7E6. These noises are very deliberate.
Of course, this is yet another theory. If director Alan Taylor is to be believed, this is all irrelevant and one of the Stark sisters is possibly going to die at the hands of the other.
"I love the fact that these two come back, they're both lethal, and I just wanted to give the impression, as much as possible, that one of them is going to die, but you're not sure which one," Taylor told Huffington Post. "Arya is certainly lethal and sort of threatening, but when Sansa sends Brienne away, who is Arya's natural protector, something is coming very soon between them, and it will be violent but surprising."
At this point, all we can do is sit and wait this one out.