Levi Ackerman. Often formally referred to as Captain Levi. The squad captain of the Special Operations Squad within the Survey Corps. Is widely known as humanity's strongest soldier. Harsh and unsocial, but is also well-regarded by his subordinates and he cares about their lives. Short. Black hair. Dull gray eyes. A “clean freak" by those who know him personally, prefers environment and himself to be spotless. Not very approachable. Rarely shows emotion. Not above provoking or belittling others.