Malevolent Entity

The Malevolent Entity is the unnamed primary antagonist of Persona 4 Arena.

Appearances

 * Persona 4 Arena: Midboss: Investigation Team Story Mode (excluding Teddie) & Yu Narukami Arcade Mode, Final Boss: Shadow Operatives/Naoto Shirogane Story Mode
 * Persona 4: The Ultimax Ultra Suplex Hold

Persona 4 Arena
As the true mastermind behind the events of the game, it was the Malevolent Entity who had Labrys thrown into the Midnight Channel after tampering with the artificial maiden's memories in order to lure both the Investigation Team and the Shadow Operatives into the Midnight Channel. It sought to use the events of the game to break the wills of those involved and turn their Personas into Shadows, to recruit the other selves for a currently unknown goal. The Malevolent Entity apparently pursued the Shadow Operatives (specifically the former members of SEES) and the Investigation Team because they were able to drive back godly beings such as Nyx, Erebus and Izanami. It is however revealed that the Malevolent Entity has allied itself with an ordinary human in order to use the human to find something the Malevolent Entity refers to as 'the One True Vessel'. This human, identified only as the Eerie Voice, is implied to have a connection to the Kirijo Group, as he shows himself capable of utilizing Kirijo Group protocols and taking control of Kirijo Group technology such as Labrys at will.

While its true form is unknown, the Malevolent Entity exhibits a wide range of powers; It is capable of appearing out of and disappearing into thin air at will, shape-shifting, duplicating the powers of others (including their Personas), telepathy and even outright mind control, among other abilities. The Entity appears before the Shadow Operatives and the Investigation Team posing as their Shadow Selves in order to weaken the protagonists' resolves throughout the game, and eventually serves as the final boss for Naoto Shirogane and the Shadow Operatives' story modes.

For the Investigation Team (except Yu, Naoto and Teddie) and Aigis, the Entity appears right before they confront General Teddie, and for the Shadow Operatives, Naoto, and Yu, it appears while Labrys is under its control. However, the Entity appears before Aigis twice in her Story Mode, both before she confronts General Teddie and after she drives away a hijacked Labrys, and it appears before Yu in the middle of his Arcade Mode and final boss in his story mode. The Entity does not appear before Teddie and Elizabeth. However, Elizabeth encounters and drives the Entity away to defend a distraught Aigis in the latter's Story Mode.

Persona 4 Arena: The Ultimax Super Suplex Hold
In Teddie's arcade, it is revealed that the Malevolent Entity is masquerading as "General Teddie" during the P-1 Climax, and is "feigning cooperation" with Sho Minazuki until he obtains his "one true vessel."

Trivia

 * After fighting Kanji Tatsumi in his story mode, the Malevolent Entity reveals its true voice and motives, while still in Shadow Kanji's form.