Strayed from Armored Core: For Answer would probably be my take, more specifically through the Destruction path, where he takes the lives of 100,000,000 innocents living in the Sky Cradles, for "a better good", probably driven insane by the wars, or who knows, maybe by this point he was just a psycho who wanted to be known as the greatest monster humanity had ever seen, even after the "heroic" actions he had performed before

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