He's not BSAA. He's a secret agent like Ada. Notice is attire is nothing like what the BSAA wears. I believe he is just called The Agent aswell.
I was going to ask about this. I wondered why a BSAA agent would be working with Ada, as she is wanted by the BSAA in this game. --- More and more, I find myself wondering if it's all worth fighting for...for a future without fear...yeah, it's worth it. (Chris Redfield)
Canonically, the chara doesnt even exist so everything ish possible --- GT: RineN1. State you are from here before adding! Waiting for: Dead Space 3(360) Playing: RE 6(360) Trouble Witches Neo(XBLA) Watching: Panty & Stocking