Sherry Birkin (Resident Evil 6)

Sherry was one of just a small handful of people who survived the Raccoon city incident. Her ordeal in Raccoon City resulted in her being infected with the G Virus, but despite being cured it still resulted in her being captured by the Government and examined over the course of many years. However, she was offered a position of becoming a special agent, and has since become a U.S. agent working under the direct command of a U.S. presidential aide.