While both Joel and Ellie will reprise their roles for The Last of Us: Part II, you'll be playing as Ellie in the upcoming PlayStation 4 exclusive. Neil Druckmann, the writer and director of the game, confirmed as much during the game's PSX 2016 panel. Ellie was, of course, playable for parts of the original – but she'll be the primary protagonist this time out.
Druckmann also confirmed that Ellie is 19-years-old in this title, so it's set a few years after the first game. Apparently, where the original game was a love story, this will be more about hate, which was reflected by some of the dialogue in the trailer.