Game Of Thrones Season 7 Finale: Predicting Who Lives & Who Dies
14. Sansa Stark

Where She'll Be
Winterfell, alone and isolated as Arya stalks around being a serial killer clone. She'll no doubt be fighting off Littlefinger again, with Brienne and Pod out of the picture, though she might actually have her own play in the offing.
Verdict: Lives
There's a pretty intriguing theory that suggests that Sansa and Arya are actually turning Littlefinger's tables on him and pretending to clash in order to lull him into a false sense of security before killing him off. If that's the case, expect Sansa to live to keep watch over Winterfell until Jon returns next season at some point.
Even if her and Arya do legitimately clash, though, she won't die, as we know she's yet to deliver the "the lone wolf" speech from the first trailer, which she presumably uses to remind Arya of her family tie.
13. Arya Stark

Where She'll Be
At Winterfell, Bag O Faces in tow and creeping around the dark corridors that Littlefinger isn't creeping around. We're being set up to think that she and Sansa will clash, but logical story-telling suggests they will actually unite against him to get some vengeance for their father finally.
Verdict: Lives
Arya probably has a part to play in the great war against the Night King - since she WAS the owner of the Valyrian Steel Catspaw Dagger, as gifted by The Three-Eyed Raven who does nothing that doesn't mean something.
Expect her to cheer on the death of Littlefinger and make up with Sansa.