The game's main antagonist, Genesis Rhapsodos, was created as a collaboration between Camui Gackt and Hideki Imaizumi, the game's producer. Gackt's original involvement with Square Enix was in singing the theme music for Dirge of Cerberus: Final Fantasy VII, "Redemption", and appearing as a minor role in that game playing Genesis. Imaizumi thought such a passing role was a waste and asked for him to have more involvement, and asked for his help in coming up with Genesis's design, describing everything from his attitude to his clothes.