You're holder of Warhammer Titan. You were one of Marley Warriors send to Paradise to destroy walls and capture Founding Titan, but... you fell for him. You fell for person who you were supposed to capture, so you told about everything to government and since that time you're officially a Survey Corp soldier... some of your classmates from 104th Training Corp still can't belive that you were their enemy, you're still hurt by Eren's harsh look when you two meet and talk.