Petyr “Littlefinger” Baelish (Aidan Gillen)
Who: Master manipulator Littlefinger delivered the Knights of the Vale to strike the winning blow in the Battle of the Bastards – all the while whispering a dissembler’s poison into Sansa’s ear. She’s the heir to Winterfell, he reminds her and warns her that Jon Snow will take the power of that position from her.
Last seen: Giving Sansa a knowing – and sinister – look as Jon is named “King in the North.”