Finn similarly has an unknown background, having been taking as a child soldier by the First Order. He doesn't even know his real name! In addition to exploring Rey's past, Star Wars: The Last Jedi will also shine a light on the origins of Finn and where he comes from.
We will learn more about his past and where he came from, and potentially why he made the decision [to escape] that he made. I'm also very curious. The question that needs to be answered is why he decided to leave as a stormtrooper in the first place. We will find out just a little bit more about him.
Star War: The Last Jedi has no shortage of backstories to get through. In addition to Rey and Luke Skywalker, the sequel will also tackle Finn's origins as a soldier for the First Order. Finn will be grappling with what he wants in the movie, and whether he wants to stay with the Resistance or not.Read more at Cinemablend