Board Thread:Questions and Answers/@comment-27713352-20160919182058/@comment-29958651-20160925144609

You're right. Armin started suspecting Annie about being the Female Titan just after their closest confrontation (The fact you didn't kill me back there ... that was the moment that set us in the path for current situation). Till that moment, he suspected Annie only about killing the captured Titans and about being involved in Marco's death. But even thought, it still seems to me like a good reason to kill Armin. (Why didn't I do anything then? She clearly was even after all not sure about the real reason why she had spared Armin's life)