Who is C.C.
She was first seen in the first episode where she emerged, bound, from the fake gas capsule seized by the Japanese rebels. She then saved the show protagonist, Lelouch Lamperouge from the Britannia soldiers
by taking the shot intended for him, resulting in her being shot in the head. When Lelouch thought that she was dead, C.C suddenly touched his hand and transported him to a mysterious plane, within which she proposes to him a contract, offering him an ability she calls the "Power of the King" - the mythical power of Geass - which allows him to make people blindly obey his orders. Lelouch, who longed for an opportunity to undermine Britannia, accepted and bound himself to the pact. He later used this power to order the Britannian soldiers to kill themselves, after which he began his rebellion against the Empire.She reappeared in episode 5, where she was folding origami with Nunnally, much to the surprise of Lelouch, who had just returned home. When Lelouch donned on the mask of Zero, she passively oversaw Lelouch's missions to ensure that he did not die, often going as far as wearing his clothes and impersonate him when situations became life-threatening.
C.C. is a member of The Order of the Black Knights, but her willful attitude and lack of an official posting
ended up annoying several veterans; at one point, Tamaki went so far as to accuse her of being a member only because she's Zero's lover, a claim which she coldly denied. When Lelouch headed to Kyushu to battle the Chinese-supported rebellion, C.C. co-piloted the Gawain Knightmare Frame with him, apparently handling the actual piloting while Lelouch operated the weapons. She also has a strong penchant for pizza, especially Pizza Hut's, much to Lelouch's (whose credit card she frequently uses to buy the food) exasperation.

In episode 25, when Lelouch learned that Nunnally was kidnapped by V.V, they took the Gawain Knightmare Frame to Kaminejima to search for his kidnapped sister, but fell into a trap that reveals part of C.C.'s memories to Lelouch which she refers to herself as a witch, saying that she's been alive so long she can no longer remember who loves her and who hates her. Lelouch then affirms to C.C. that they are still accomplices, by saying:
but they are immediately attacked by Jeremiah Gottwald, who followed them to Kaminejima. C.C. tells Lelouch to go look for Nunnally while she deals with Jeremiah Gottwald with a weakened Gawain and gave Lelouch a kiss, much to his surprise. At the end of season one she is falling with the Gawain to the ocean floor while narrating that the spark of Lelouch's actions was the core of human motivation, the desire for just a small amount of happiness.
