Haus Berlin

Sansa won’t be found as she won’t want to. Like ever. To twist Jaime‘s words about missing Arya into being about Sansa: Who is going to say that she is Sansa Stark? Everyone the girl was close to is dead except for her sister (…) Maybe Arya will take up her sister’s identity since her own identity is already taken by Jeyne Pool. Compared to her sister Sansa won’t be competitive enough to be ever herself again. Sansa isn’t into the rich girl’s thing any longer. Lady is long dead. Sansa now is saving her own skin by observing how humans interact and it seems revolution is in the air with that many would-bes around. She is good off being no one.

As the Jeanne d‘Arc character of this series I expect a somewhat muddy outcome for Brienne and where to place her politically after all. She already is a living legend, supporting/ killing former master of law and unlawful king Renly - just to side with the Lannisters afterwards and going after their crimes the same time. With two books to come there is enough room for further confusion. She and the Brotherhood without Banners are a perfect match considering their cloudy mandates. Ned as Hand of the King had curated knights who won over partisans and now Brienne shows up with king Tommen‘s carte blanche and an interesting crossover sword at hand. Surely some sort of executive branch is in the making here and we can expect core political questions being tackled by that. Like, where and when does these people‘s power end and to what measure and means violence is an option. Readers believe in Brienne‘s good will, but is she really a good judge from what we know of her? And is she supposed to be that? There is a need for new common ground on the battlefield the Riverlands were turned into. And wouldn’t it be merry if some Goldenhand the Just went out on a search for a source of justice? But it is unlikely things work out nicely and yet they might be tried. So my guess is: The Brotherhood without Banners and Brienne through the Lord Commander‘s absence confiscate Frey areas and raise a proto-republic as a warm welcome for any lost (Stark) child. But under the pressure of wars and a lot more winter to come their neighbouring countries likely won’t accept a waiting room and terreur emerges to defend the mere idea.

https://awoiaf.westeros.org/index.php/Duncan_the_Tall#Appearance_and_Character

And then there is Melisandre.