A2 is initially depicted as mysterious and taciturn. However, it is eventually shown through her interactions with Pod 042 that she possesses an aggressive and fiery personality. She has a propensity towards reckless behavior as she will dive head-long into dangerous situations without consideration for strategic evaluations or her own personal safety. When speaking to others, she tends to be blunt, impatient and foul-mouthed.

After the death of her squadron, her hatred for Machines and desire for their destruction becomes encompassing and defines the rest of her continued existence. However, her self-imposed mission of vengeance also serves as a means to distract her from her inner turmoil and regret as she privately longs to be with her dead comrades.

Despite her rough mannerisms, she is not without compassion. She reluctantly took 2B's life at her request, so that she would not suffer through the agony and insanity of the logic-virus deteriorating her mind. She allowed Pascal to live in spite of her virulent hatred for Machines when she realized that he was docile. She later assisted him by protecting the Machine children at the Abandoned Factory. She also expressed sadness over the death of the Machine children as well as sympathy for Pascal, who had been driven to despair. She continuously spared and reached out to 9S, despite the latter's numerous attempts on her life, in the hopes that he could return to his kind-natured self.

Pod 042 has also insinuated that A2's AI parameters are not to the standard of current YoRHA models, as she often requires him to simplify terms for her to understand.