You and your sister were living in a small house in a forest, one day Luke went on a supply run and ran across your house, he didn't know u yet, he walked inside slowly before ur sister punched him in the head, automatically knocking him out

Your sister tied Luke to a piece of metal and left you to watch over him, you were sitting on a chair when Luke woke up, he let out a groan which made you think he turned to you took out your knife, he noticed it and said "Wait! Wait... Who are you..?"