Ada's scenario are often played with or without a partner and a second player who joins will control the non-canonical character Agent. The character not selected by the player is controlled by either AI (AI) or another player via local or online multiplayer. Kennedy, Bioterrorism Security Assessment Alliance (BSAA) Captain Chris Redfield, mercenary Jake Muller, and spy Ada Wong.within the Leon, Chris, and Jake scenarios, players have the choice of controlling either them or their respective partners, us United States Secret Service agent Helena Harper, BSAA sniper Piers Nivans, and DSO agent Sherry Birkin. Resident Evil 6 allows players to pick between four scenarios with interwoven storylines centered on Division of Security Operations (DSO) agent Leon S.