FN 2187 aka Finn aka the traitor of the First Order. I thought it was a really interesting concept to have Storm Troopers be actual people rather than continue with having them be clones. It was an interesting idea that they pointed out in the story as well when Kylo Ren and General Hux were arguing about clones vs. the trained people as Storm Troopers.
Let's keep moving forward with Star Wars! Thank you guys so much. Until next time, keep busy staying dizzy!