
シー・ツー
Also known as: Witch of Britannia, Gray Witch, Pizza Girl, C2
Height: 167 cm Allegiance: The Black Knights C.C. is apparently immortal, healing from any wound (implied to include beheading) with enough time. She also doesn't age. Apart from her immortality, C.C. can bestow people with the power of Geass, which manifests differently in each person but generally carries the ability to affect the minds of those it is used on in some way. The Geass sigil glows on her forehead whenever she manifests this power, and she has a similar scar on her left breast. It is hinted that many more like her exist, as shown in her memories of many children with similar sigils, and she suggests that the power has precipitated bloody conflicts in the past. Her powers caught the interest of Britannia, who imprisoned her for experimentation purposes.
Description from AniList, spoilers removed.

Code Geass: Lelouch of the Rebellion
Main · 2006 · TV · ★ 8.5

Code Geass: Lelouch of the Rebellion R2
Main · 2008 · TV · ★ 8.7

Code Geass: Lelouch of the Re;surrection
Main · 2019 · MOVIE · ★ 7.7

Code Geass: Rozé of the Recapture
Background · 2024 · ONA · ★ 6.4

Code Geass: Lelouch of the Rebellion I - Initiation
Main · 2017 · MOVIE · ★ 7.6

Code Geass: Lelouch of the Rebellion III - Glorification
Main · 2018 · MOVIE · ★ 7.8

Code Geass: Lelouch of the Rebellion II - Transgression
Main · 2018 · MOVIE · ★ 7.4

Code Geass: Akito the Exiled - The Brightness Falls
Background · 2015 · MOVIE · ★ 6.9

Code Geass: Nunnally in Wonderland
Supporting · 2012 · OVA · ★ 6.1

Code Geass: Hangyaku no Lelouch R2 Picture Drama
Main · 2008 · SPECIAL · ★ 6.5