A mysterious boy who, like C.C., is immortal and controls the power of Geass. It is revealed that he is the twin brother of the Emperor of Britannia. He had a connection with C.C. and the late Marianne, and after C.C. fled, he became their savior of the Geass Organization. He was planning to "kill the gods" with the Emperor of Britannia.
He was injured in the battle against Lelouch, and when he contacted the Emperor he lost his immortality for some reason, and died.