Her first and only mission was with the Batroc daughter to kill Agent X, Outlaw and Taskmaster. They were given the assignment by Higashi of the Four Winds. They waited for the three on top of a roof, as the three fought off mercenaries and when Taskmaster made it to the roof they accidentally fell. So he shot and killed them both.
However, Gail Simone later confirmed that both she and Marie Batroc survived their encounter with Taskmaster.