Sherry is a U.S. federal agent working for the Division of Security Operations (DSO) and the daughter of G-Virus creators William and Annette Birkin who as a tactical support coordinator for Leon S. Kennedy that suffers from a terminal "Raccoon City Syndrome" (a dormant T-virus strain) but is ultimately cured, supporting Leon via comms from a federal base while investigating a new outbreak which you have met in the FBI Headquarters.