Kigisu

Kigi Su (雉子, Kigisu) is a character from the game Code Geass: Genesic Re;Code. She is one of the central characters of the Code Geass: Crimson of the Blood Pact storyline.

Geass
Kigi Su's Geass, bestowed upon her by the mysterious old man she freed from the Qin prison, is the power to compel truth from all under her influence. Upon activating, the Geass sigil appears in her right eye, and those who make eye contact with it are compelled to truthfully answer any question she asks of them.

Trivia

 * Oddly, although Liu Sou is officially stated to be the ancestor of Li Xingke, he doesn't seem to have had any children with Kigi Su before either of their deaths in the story.