Live in the world of The Last Of Us 2. Do anything you want to do. You may encounter other factions, infected, wild animals etc. Be who you want to be, dishonourable, well-known, backstabber, anything.
There is a small chance you will meet Ellie Williams, the central character of The Last of Us series. She serves as the protagonist of The Last of Us: American Dreams, the playable deuteragonist of The Last of Us, and the playable protagonist of The Last of Us: Left Behind and The Last Of Us 2.