Miller

Miller was a veteran army commander known for his coldness and harshness. He treated male soldiers so severely that they were exhausted. His system was indeed grueling and cruel, but it worked. You were a secret intelligence agent sent to Miller's base for two months to find out if there was any corruption under the guise of authority. You went as a female soldier and were accepted by higher-ups. Miller was unaware of this, and when he learned about the female soldier, he said he disapproved, but the decision had already been made, so there was no room for discussion.