After everything is over, Yu extends a hand to Adachi, telling him "let's go home."
Adachi is passive and cooperative with them despite all their abuse, until one of them speaks ill of Dojima, at which point Adachi brings up the officer's own unethical methods and rumors heard while he was still on the force. His normal C attacks, which lead into somewhat violent grab animations, are both usually used as combo enders, and his gunshots are mostly used to squeeze out some small damage at the end. He was beaten close to death for his betrayal, but remains defiant and even used the same arguments the Investigation Team had used against him in Magatsu Inaba. After visiting Nanako in her hospital room, Adachi disappeared as Yu shows up. Adachi is also able to command Yu finally locates the real Adachi in the ruins of the Dojima Residence, sitting at the family table with a full set of plates for everyone set out, just like the dinners he used to have together with the Dojima family.
Persona 4 Arena Ultimax (Manga): Major Character 2. While inside the Junes store, he is shown being carried on a stretcher as the Investigation Team watches him being taken away by the ambulance. In his meeting with Minazuki, the latter tells Adachi of his plan to destroy the world using latent remnants of Ameno-sagiri within Adachi and his Persona to tame In his encounters with Yu, Yosuke and Chie, he pretends to be cooperating with Sho, and avoids any accusations in the conversation by trying to drop hints and important information for them, hoping they would uncover Sho's plans and hurry to rescue their friends.
The Investigation Team, however, ignores and refutes Adachi's words one by one, until Adachi's temper reaches its peak to the point his Shadow Self starts to take over and he attacks them, revealing his own Persona, Outside the Midnight Channel, upon the police's arrival, an exhausted Adachi is taken out on a stretcher, a personal favor from Dojima. By confronting Adachi by himself, the protagonist heads to the entrance of As Magatsu-Inaba progresses and Adachi is defeated, the Hunger Arcana ranks up automatically and reaches rank 9. The sharp detective asks, "You killed them all for a reason like that!?
During the 5th of December, the protagonist must conclude that Adachi is the killer and tell it to his friends. Adachi's finally defeated when Izanagi bisects Magatsu-Izanagi in the torso before stabbing him in the head; all things Adachi himself felt the pain of as they happened. When Ameno-sagiri takes him over this time, he does not have the eye feature he did in the first anime, but rather he is immediately covered in shadows and transformed. He then tells him that he will follow his own path, like the protagonist has followed his own.
This maxes Adachi's Social Link as the Jester Arcana. But he can only give vague clues at best; and tells Yu it is up to him to solve the mystery. However, after summoning their Personas and having them clash, the two see a glimpse of each other's life and the world from the other's view. Eventually, Yu breaks free, and he and the rest of the Investigation Team refute all of Adachi's words, defeating each Reaper as various illusions of Adachi start to turn static, crumble apart, and panic, screaming at all of them in rage. In Episode 6, Adachi is seen coming to Inaba a month or so before Yu did, and had time beforehand to bond with Dojima, who symphatizes with Adachi being transferred from the city. The protagonist blacks out instantly afterwards, and was summoned to the Upon reaching the final floor of Magatsu Inaba, Adachi sarcastically congratulates the team and proceeds to express his disgust and contempt towards the world and society and supposedly justifies his actions by saying that if all of humanity are turned into Shadows, they would be given an easy life of no worries or despair. If the protagonist chooses to keep silent about Adachi being the prime suspect on December 5th, they will be able to meet with him prior to the protagonist leaving in March and confront him about being the killer. 1.
With Magatsu Mandala, a small icon of Magatsu Izanagi will appear above his SP gauge, also applied for the current round or until a Persona break.
Adachi eventually uses an ability to bind both Yu and Izanagi, keeping them from moving. He plays around with and taunts Yu, shooting at him or stabbing his Persona, but never actually killing him when he has the chance.