Okay so I am surprised that this hasn't come up with. Okay in RE we know that she....... faked a relationship with an employee at an umbrella branch of Chicago in order to get closer to umbrella to obtain research from them. During the outbreak of raccoon city she was working under Albert Wesker in order to obtain the g virus, however we also know that she was working for Derrick Simmons at the same time doing some missions for him. She ends up obtaining the g virus sample for Wesker and escapes via an umbrella chopper leaving the city moments before its destruction. She learns that Simmons was one of the ones who made the decision to blow up the city so she leaves Simmons. in 2004 She then obtains a las plagla's sample for Wesker but not the one he wanted. We also know she is working for the "3d organization" or something like that. and no the organization is not tricell that wouldn't make any sense because Wesker had to get a dominant sample himself from the body of Krauser. And in RE 6 we still don't know who she is working for. Seriously if anyone has any theories then please enlighten me.............