結城 ヤマト

Official name "Imperial Army Zero Type, Full Territory Ambush Support Combat Engineer", alias "Stryker Zero". Blunt personality, not really worrying about minor details. When the Balbora Empire isn't around to be his opponent, he'll also be a Stryker whose purpose is helping others.

To confront the Empire, he transferred to a school in the city of his own accord without consulting his mother. To hide that he's a Stryker, he plays the part of a student called Yuuki Yamato. He's not aware that he is Yuuki Yamato.