C.C./Re;surrection

C.C. (シー・ツー), is one of the main characters of Code Geass: Lelouch of the Rebellion I — Initiation, Code Geass: Lelouch of the Rebellion II — Transgression, Code Geass: Lelouch of the Rebellion III — Glorification, and Code Geass: Lelouch the Re;surrection.

Code Geass: Lelouch of the Rebellion II — Transgression
At the start of the second season, C.C. appears to be commanding the Black Knights. She along with Kallen, Urabe, and the remaining Black Knights initiate an operation to unlock Zero's memory that was sealed away by the Emperor of Britannia. Despite the Intelligence Agency having followed Lelouch in anticipation of that exact outcome, she is successful in restoring his memories through an unexpected kiss. She takes up her old position following this.She is revealed to have formerly led the Geass Directorate, a secret organization that studies and produces Geass users. V.V. succeeded C.C. as the leader, and relocated the headquarters to somewhere in the Chinese Federation. Lelouch leaves her to find its exact location down while he returns to Japan. After pinpointing the location of the Geass Directorate, Lelouch orders C.C. to lead the attack against it. She also reluctantly kills V.V.'s direct subordinates when they attempt to escape by bullet train in order to bury the existence of Geass.

Her past is revealed to Lelouch after he is transported to the Sword of Akasha to face the Emperor. She also reveals that he would have become immortal had he been able to take her code, rendering her mortal and thus granting her wish, which is to die and spares him by offering her life to the Emperor. Lelouch refuses to let her die unhappy and rescues her, telling his father that he would not let him take her away from him. As a result of this she loses her memories of Geass and reverts to her personality as it was before she came under the contract that ultimately bestowed immortality upon her. Later, it is revealed by Marianne that this was a result of C.C. sealing away her own Code rather than giving it to Charles zi Britannia.