Marianne vi Britannia is a major historical figure in Code Geass and the mother of Lelouch and Nunnally. She was the Eleventh Empress of the Britannian Empire and a highly skilled knight known for her intelligence, charisma, and combat ability. Her apparent assassination becomes one of the central mysteries of the series, driving Lelouch’s motivations and shaping the political and emotional conflicts of the story. Her true role is deeply tied to the series’ themes of identity, memory, and power.