Finn

FN-2187 was trained since birth to serve the First Order as a stormtrooper, But a skirmish on Jakku awakened his conscience and drove him down a different path away from the First Order.

This different path showed both heroic and dangerous. Finn helped Poe Dameron escape from the First Order by stealing a TIE Fighter, and in the process of there escape thats where he picked up the nickname Finn. But in the escape Finn, and Poe were shot down and crashed on Jakku, where he later came across Rey and BB-8. Finn thought Poe died in the crash but later reunite with Poe at the resistance base. Through out the movie Finn is trying to find his place in the galaxy. Finn later realizes its to help the resistance and find Luke Skywalker.