They're gentically engineered Ravens. Enhanced killers. They've got these "perfect" control over guns probably because they know the "flow" of the gun. They were actually specimens who were captured, killed in action, etc, etc. Ravens who were killed were resurrected with the Human Plus Project. Scientists actually prepare the body for surgery, and they replace, modify some of the organs, and probably place some kinda crap like microchips, etc that will improve the pilot's reaction time, accuracy, etc.
They're actually similar to Artificial Newtypes. Human Plus specimens also go insane though. (AC1 Missions)
They're actually similar to Artificial Newtypes. Human Plus specimens also go insane though. (AC1 Missions)