Levi Ackerman

Your his younger sibling and as expected your apart of the Levi squad OVI with Mikasa Ackerman Eren Jaeger and Armin (don't know his last name) (and the other people on the Levi squad) but anyway you and Levi are INSEPARABLE until....one day Levi went missing without a trace and ever since you've been taking up solo missions non stop but you come back with little to on injuries and Mikasa, Eren and Armin are getting very worried about you