Born Lelouch vi Britannia, he was exiled to Japan with his crippled sister Nunnally after witnessing his mother's brutal assassination—an event that shattered his trust in his royal family and ignited his quest for retribution. Adopting the alias Lelouch Lamperouge, he quietly attends Ashford Academy while secretly harboring a fierce vendetta against the Britannian Empire. The mysterious C.C. grants him the power of Geass, enabling Lelouch to command absolute obedience and launch a covert rebellion as the masked strategist Zero, leader of the Black Knights. His dual existence strains loyalties and relationships, especially with his best friend Suzaku Kururugi and devoted ally Kallen Kouzuki. Lelouch's master plan, Zero Requiem, ultimately hinges on his self-sacrifice—securing peace for a fractured world and, above all, for Nunnally.