Aigis is voiced by Karen Strassman in the English Versions of Persona and Maaya Sakamoto in the Japanese versions. 

Aigis is a robotic, however she has a personality so she shouldn't sound too stoic, but should still speak like a robot!

Aigis' initial personality is simply a robot designed to obey orders, although she is drawn to the protagonist and states that it is very important for her to be by his side, going so far as to hug them in front of everyone. Her desire to protect the protagonist is so strong, in fact, that she was able to overcome Ikutsuki's programming and free the entire team from their shackles, when Ikutsuki had attempted to sacrifice them to bring forth the Fall. As a result of having no emotions, Aigis' social skills are more-or-less non-existent; it's frequently noted on-screen that while she may look human, she is far from passing as one. She is prone to doing very strange and socially unacceptable things, such as breaking into the protagonist's room to wake him up and requesting to be on standby in their room, which Yukari calls her out for. A video recording shows that she has a habit of breaking into his dorm room at night in order to check on him, even going so far as to keep a record of how long it takes her to pick the lock, In Falling Down, she even goes so far as to sneak into the boy's rooms during the group's stay in Kyoto, claiming it was unfair that she and Makoto weren't in the same room. Lack of social grace notwithstanding, Aigis is nonetheless very polite to everybody, always using the honorific '-san' when addressing them. In the original Japanese version, she ends her sentences with "de arimasu" prior to developing emotions.