*Cammy is a teenaged agent of the Delta Red commando task force, operating within Britain's Secret Intelligence Service (MI6). Enhanced by Bison's genome, she once worked as an assassin for Shadaloo under the codename of "Killer Bee" (as seen in X-Men vs. Street Fighter and Street Fighter Alpha 3). At the end of Alpha 3, she rebelled against Bison, lost her memories, and was taken to Britain (by Vega); it was there that she joined the special forces unit known as Delta Red. Cammy participated in the Super Street Fighter II tournament to learn about her past; she learned the shocking truth from Bison himself, but managed to cope with the revelation thanks to the support of her Delta Red comrades.

In Street Fighter IV, she is sent to investigate S.I.N.'s connection to Shadaloo and to acquire data on the BLECE Project. She's also there for a personal reason: Juri Han, a member of S.I.N, gave a brutal beatdown to the Shadaloo Dolls, whom she considers her younger sisters.

Cammy returns in Street Fighter V still in her Delta Red incarnation but sporting an updated look, reminiscent of her appearance in the spin-off Cannon Spike. During the interim between IV and V, she has continued investigating Shadaloo while also tending to her fellow Doll Juni, who is now amnesic and getting accustomed once more to a normal life.

Returning in 6, Cammy is finally free of her pursuit against Bison, the dictator having been killed in the previous game. Still working with Delta Red and now based at HQ, she spends her time pursuing missions in her home country of England, sporting a new attire that lets her blend in as a civilian.*