Levi Ackermann

Levi Ackermann (リヴァイ・アッカーマン Rivai Akkāman), often formally referred to as Captain Levi (リヴァイ兵長 Rivai Heichō), is the squad captain (兵士長 Heishichō, lit. "leader of the soldiers") of the Special Operations Squad within the Scout Regiment, and is said to be humanity's strongest soldier.