Aigis is an anti-shadow android created by the Kirijo Group whose sole purpose is to defeat Shadows. She also has human-like functionalities, allowing her to socialize with her dormmates, and enable her to control her own persona. Her weapons consist of rifles, grenade launchers, etc. and has the best defense out of all the SEES members. Aigis also has a special mode called "Orgia Mode" which enables her to attack the enemy at full power. Unfortunately, after using it, she breaks down, requiring immediate cool-down, and her turns will be skipped for a while. Her initial persona is Palladion and her ultimate persona is Pallas Athena, both belonging in the Chariot Arcanum. In Persona 3 FES, the player can also have the option to date her. Doing so establishes the Aeon Arcana Social Link.
Persona 3 - "The Journey"
Aigis first appears in the game when SEES takes a vacation to Yakushima. Junpei, Akihiko, and the main character go to the beach for Junpei's "Operation Babe Hunt," where they attempt to ask out as many girls as they can. Junpei then spots a girl standing by the pier, looking at distance.
The three of them attempt to ask her out but fail to do so. She is then later revealed as an anti-shadow weapon, and she is the last of her type. She would be joining SEES from then on. She also approaches the main character constantly and wants to "always be by his side" so she can protect him. Aigis also takes part in defeating the twelve Arcana Shadows, which the SEES members believe would finally put an end to the Shadows, Tartarus, and the Dark Hour.
When they defeat the last Shadow, they later find out they have been deceived by Shuji Ikutsuki. They also notice Aigis is missing. Realizing the problem might lie inside Tartarus, the SEES members investigate. Ikutsuki explains to all of them about Nyx and the Fall, and how they have helped him get closer to his goal. Aigis is controlled by Ikutsuki and orders her to eliminate the SEES members. But she cannot perform the order so because of her desire to protect and her attachment to Minato. Instead of killing SEES, she frees them, and breaks being controlled. Realizing his plan has failed, Shuji then murders Mitsuru's father atop of Tartarus and then jumps to his death.
Her Past Revealed
When Ryoji Mochizuki transfers to Gekkoukan High School, she thinks he is dangerous and is the only one constantly suspicious whenever he is around. Aigis cannot explain why, but she always says that there is something mysteriously off about Ryoji. Then, on a full moon, Aigis meets Ryoji on the Moonlight Bridge, and attacks him. It is revealed that Ryoji is Death, the thirteenth Arcana. Ten years ago, Ryoji's sole purpose of existing was to summon Nyx into the world and bring about the Fall. Aigis was created to defeat Shadows, and her first mission was to defeat Death. They had the same battle ten years ago on the same location.
But Aigis could not defeat Death, and did what she thought was necessary; she sealed Death inside a young boy, who happened to be in a car accident nearby. That young boy turned out to be Minato Arisato. This is why she feels a strong attachment to Minato.
Finally regaining their memories, Ryoji claims he is different from before, having been inside Minato for ten years and inheriting his human qualities. Aigis is still unable to defeat Ryoji and shuts down after the battle. When she finally reawakens, her personality is more human. Once SEES decides to fight Nyx, Ryoji tells them that they must reach the top on January 31st. Before he leaves, he apologizes to Aigis for all the pain he put her through. Aigis replies: "I will never forget that you were my enemy, and my friend."
When SEES fight Nyx and the main character performs the Great Seal, Aigis and him were the only ones who still have memories of Tartarus, Dark Hour, and the final battle. On the Gekkoukan High rooftops, the main character lays on Aigis's lap and dies in his sleep. Aigis vows to protect him always.
Persona 3 FES - "The Answer"
In Persona 3 FES, "The Answer" chapter, Aigis replaces Minato as the main character. Having sacrificed himself in the final battle to seal away Nyx, he died in his sleep. Still feeling guilty about not being able to protect the main character, she decides not to attend Gekkoukan High School when the next school year starts, and remains in the lab. She also keeps his evoker after his death. When Metis emerges from the floor of the dormitory and attacks everyone, they find out a new threat has emerged.
They also discover they are stuck inside the dorm and the date March 31st is always repeating. To get rid of the threat, they venture within the Abyss of Time and attempt to learn what they're up against.
Aigis inherits the main character's power to summon multiple personae -- the Wild Card power -- giving her access to the Velvet Room, as he did. When they get to the end, the group decides to open the door to the past, when Minato used the Great Seal on Nyx during the final battle. Minato has also become the Great Seal himself, sealing off Nyx to prevent humanity from calling out to her. Finally understanding what really happened to him, Aigis and the others promise to live the most out of their lives. It can be inferred in the ending that Aigis attends Gekkoukan High the following school year and lives with Yukari as dorm-mates.
Introduced in Persona 3: FES's epilogue chapter, The Answer, Metis is a humanoid android in the same vein as Aigis, and her design shows many visual similarities. However, while Aigis' exterior is mostly white, Metis' by contrast is almost completely black, with a red butterfly motif that is mirrored in her persona, Psyche. She is first encountered during a temporal anomaly within the Minatodai Dormitory, where she appears suddenly and attacks the members of SEES unprovoked. She claims at this time to be related to Aigis by way of manufacture, and that she attacks her friends in order to protect her; after being subdued, she remains mistrustful of all members of the Execution Squad save for her "sister" Aigis. She persuades them to enter the Abyss of Time in order to stop the temporal anomaly that has engulfed the dorm, though the group seems uncertain about Metis herself. She remains standoffish in the face of the group's continued questioning, though her attitude changes when Aigis suggests that SEES could not take someone with them who would bring discord to the group. Distraught by the idea of being left behind by Aigis, Metis promises not to harm any of her sister's companions. Satisfied with her pledge, Aigis allows her to come with them.
Much later in The Answer, after the final battle is won, SEES is transported to the Velvet Room, where Metis is seen seated at Igor's right hand. It is at this point that Aigis realizes that Metis is her "other" self, created when she tried to escape the guilt of the Protagonist's death by wishing that she was just a machine. With Aigis having finally come to terms with her feelings, she and Metis are reunited with one another, and Aigis comments that she is suddenly tired, a state that she had been unable to experience for some time.
Persona 4 Arena
In Persona 4 Arena, Aigis is an agent of the anti-Shadow organization founded through a secret partnership through the Kirijo Group and the Secret Police. She is also one of it's top-ranking members. After thwarting an attempt at hijacking an airliner, she travels with Mitsuru to Inaba in search of cargo stolen from the airplane; namely, her sister android, Labrys. Their investigation takes them into the TV world, and Aigis is forced to compete the P-1 Grand Prix.
- Escape Change (B + D) [P]: Aigis propels herself backward and engages Orgia Mode.
- Mode Change (22A or B) [SB]: Engages Orgia Mode.
- 7th Gen Gatling Blast (236A or B) [SB]: Summons a Gatling gun, its firepower pushing Aigis' opponent back.
- 7th Gen Radical Cannon (214A or B) [SB]: A large cannon appears from Aigis' back, firing an anti-air shot.
- 7th Gen Vulcan Cannon (j.236A or B) [SB]: Aigis fires a spread of bullets downward.
- Orgia Boost (Hold 6): When in Orgia mode, Aigis will thrust herself forward rapidly.
- Back Boost (44): Aigis will thrust herself backward rapidly.
- Hover Boost (j. hold 8): Aigis temporarily floats in the air.
- Megido Fire EX (236C or D): Pallas Athena spins and attacks the opponent with fire attacks.
- Pandora Missile Launcher (214C or D): Aigis thrusts herself backward while firing a barrage of missiles towards the opponent.
- Goddess Shield (236236C or D) [P]: Athena covers Aigis with her shield and they bash an enemy.
Awakened SP Skill
- Heavenly Spear (214214C or D) [P]: Athena appears and throws her spear upward.
- Heritage Liberator Palladion (j.222C + D) [P]: Aigis launches a massive spear to impale the opponent.
- Aigis is voiced by Maaya Sakamoto in the Japanese version of Persona 3, while voiced by Karen Strassman in the English version.
- Aigis is the only character known to have switched their Arcana, inheriting The Fool and Wild Card from the P3 protagonist.