An android from a faraway world, her proper name is YoRHa Type A No. 2. An attacker model implementing a close-range attack style not currently used, she is a prototype of the current official YoRHa soldier models like 2B and 9S, and closely resembles 2B. Long ago, she was thrust into a large scale fight by the human military headquarters to be tested, but afterwards it is said she deserted and went completely AWOL.
An android from a faraway world, she once belonged to the human's military, but ended up running away after a certain battle. Though completely AWOL, it is said she is still fighting to destroy the machine lifeforms. An attacker model developed to be good at close-range attacks, her ability to enable "B mode" which greatly increases her attack power for a short amount of time sets her apart from the all-purpose 2B model.
An android from a faraway world, she once belonged to the human's military, but ended up running away after a certain battle. A2 continued fighting the machine lifeforms by herself in order to end their existence. However, a fated meeting with some of the androids fighting on behalf of the surviving humans had a great impact on her actions thereon, and on the conclusion of the lengthy war.