Ruki

Ruki (瑠姫, Ruki) 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
Ruki's Geass, bestowed upon her by the mysterious woman called Horai for rescuing her, is the power to stop the hearts of others. Upon activating, the Geass sigil appears in her left eye, and those who make eye contact with it have their heart stopped. This ability is indiscriminate, and takes effect immediately upon looking into her eyes, and the victims of this ability will die.