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The story of Persona 4 begins when the Protagonist meets Igor and Margaret in the Velvet Room, in the form of a limousine driving in a thick fog; the shape of the Velvet Room changes based on its visitor.

The Protagonist's first Persona, Izanagi of the Fool Arcana, wears a long coat reminiscent of the Japanese bancho and wields the Amenonuhoko, which, in-game, is a spear with a blade resembling a combat knife. This Persona is later transformed into Izanagi-no-Okami of the World arcana, the game's most powerful Persona.

The Protagonist also has a unique "wild card" ability to swap Personas, similar to the main characters of previous Persona games, but without the power of Death at his hand, he cannot use Fusion spells like the Protagonist of Persona 3.

He was given his persona by Izanami, the mastermind responsible for Mayonaka TV and everything that resulted from it, who was disguised as a gas station employee and gave it to him with a handshake at the beginning of the game. In the final battle, he uses his commu power to summon Izanagi-no-Okami and kill Izanami with a single attack.