Olga Sergeyevna Gurlukovich was the daughter of Sergei Gurlukovich, and a member of his private army, the Gurlukovich Mercenaries. She took command of her father's unit after his death. She was then forced into joining the Patriots, after they kidnapped her daughter Sunny. She worked as their agent, playing an important role in the Big Shell Incident of 2009.
She turned Solid Snake's ally and he helper Raiden during his final battle with Solidus Snake.
She was killed by Solidus Snake
She is voiced by Vanessa Marshall.