Helicopter Pilot

The helicopter pilot who is waiting on the rooftop to pick up Nemesis, is the only character who meets every major player in the movie, has no name, and yet somehow survives the entire ordeal. When Umbrella finds the helicopter wreckage, the only body they find is Alice's, meaning the pilot escaped with the others.

He is not seen in Extinction, so it can only be assumed that he either went off on his own, or returned to work for Umbrella.

Interestingly, he did not seem terrible interested in the fight between Nemesis and Alice in the slightest, choosing to face the opposite direction entirely, and simply wait in his helicopter.