As they hunt down the "Red Girl" entity and the twin leaders , 2B is forced to kill 9S several times to prevent his data from being corrupted, a tragic secret she carries as part of her "Executioner" (2E) programming. The Terrible Truth
In a future where humanity has been driven to the Moon by mechanical invaders from another world, the surface of Earth belongs to the . To reclaim their home, the remnants of mankind create YoRHa , an elite force of androids stationed on the "Bunker" satellite.
A massive white structure called rises from the earth, acting as a launchpad for the Machines' final plan. 9S and A2 converge at the top. While A2 seeks to destroy the network to end the cycle, 9S only wants to destroy everything out of grief.
The androids were given a fake god (humanity) to fight for so they wouldn't lose the will to live.