"I came to see what had become of my gift to you," Ansem answered. "Surely you cannot fault me for that, when I have offered you so much already. It would be a terrible thing to waste."

Even if Riku had learned to control the darkness, it had still belonged to Ansem first. It was still something by which he could control Riku, if he had any sort of inclination to. For now, however, that was not really among the things Ansem was considering. There were other options, if he truly needed someone to act as Riku had.