What Happens to Ser Brienne of Tarth?
Brienne follows Sansa down to King's Landing, and is a part of the council that decides who should be the new king. She's also seen opening a book that contains a history of each knight who served in the Kingsguard, and filling out the rest of Jaime's page. (Ugh, queue the tears.) The last we see of Brienne, she's protecting King Bran from any potential threats, so we can assume that she's now the leader of the Kingsguard. Bravo, Brienne!
Image Source: HBO