C.C. (シー・ツー Shī Tsū, pronounced C2), is the tritagonist of Code Geass: Lelouch of the Rebellion. Her seiyu is Yukana while she is voiced by Kate Higgins in the English dub. C.C. is not her real name; she involuntarily reveals her real name to Lelouch in her sleep, but it is muted so the viewers cannot hear it.
In the 29th Anime Grand Prix, she was awarded 3rd place. She was chosen the most popular female character of 2007 and 2008 at Animage magazine's annual Anime Grand Prix.