Armin Arlert is the 15th and current commander of the Survey Corps, named so by Hange Zoë before their death. He is also a childhood friend of Eren Yeager and Mikasa Ackerman, and one of the two deuteragonists of the series. Although he appears to be among the physically weakest of the 104th Training Corps, his intelligence and strategic genius makes him an invaluable asset, especially when paired with Hange. After the battle of Shiganshina District he took the power of the Titans from Bertolt.