This female SWAT officer is trying to get to her partner that was shot. Unfortunately, there are members of the Agency in the building wielding sniper rifles making this task impossible. Gabriel Logan shows up and offers assistance to help her reach her downed partner, which she accepts. Shortly, after that, she orders Gabe to freeze but Gabe ran off since there are agents in the building. Upon killing the agents and returning to where he left the SWAT officer only that she is held at gunpoint by Lyle Stevens and then shot.
Syphon Filter 2
She is one of the characters you unlock upon getting the M-79 in the New York Sewers level. Just go all the way to the top of the stairs and kill the agents wielding M-79 grenade launchers. There will be a crate containing your personal M-79. Open it and you unlock her as a playable character.