"Thou art I, and I am thou... From the sea of thy soul, I come... From the very moment of my emergence, I have been a guiding light shed to illuminate thy path... I am the original god... Izanagi-no-Okami."
Izanagi-no-Okami (伊邪那岐大神? / イザナギノオオカミ?) is a Persona in the series.
"The Father of all in Japanese myth, as well as the ruler of creation. When forbidden to see his wife Izanami, he broke the promise, resulting in the two being separated from each other forever."
—Persona 4 compendium
The ultimate Persona of the protagonist, Izanagi-no-Okami can only be accessed in the events of the True Ending, which can be unlocked provided if the protagonist manages to choose the correct choices.
In the True Ending, the protagonist realizes that Izanami is the true mastermind behind the bizarre murder cases, and ventures into her reality within the Midnight Channel, Yomotsu Hirasaka, to put an end to her plans. Eventually facing Izanami, however, the protagonist and his comrades are engulfed by Izanami's Thousand Curses. Fortunately, the protagonist hears the voices of his friends, telling him to continue fighting on.
Accumulating the powers and bonds he forged, the protagonist channels the powers of his Social Links to his initial Persona, Izanagi, transmogrifying Izanagi into his true form, Izanagi-no-Okami. Enduring all of Izanami's assaults, the protagonist takes off his glasses, and ultimately summons Izanagi-no-Okami, ending Izanami with one powerful strike, Myriad Truths then free his comrades after the battle.
Unique from other Personas, Izanagi-no-Okami is the only Persona of The World Arcana, and while he is summoned in the final battle with Izanami-no-Okami, Izanagi-no-Okami can be summoned during a second cycle and only by achieving the game's True Ending in the previous cycle. However, as loading the data from the previous cycle technically resets the protagonist's Lv. back to 1, Izanagi-no-Okami can only be summoned once the protagonist retrains back to Lv. 91. Also, as the World Arcana is a standalone Arcana which is not represented by any Social Links, Izanagi-no-Okami does not receive any bonus EXP upon being summoned. Izanagi-no-Okami cannot be registered into the Persona Compendium nor fused with any other Persona. This however, has been slightly modified in Golden, where Izanagi-no-Okami can inherit any skills from his predecessors. However, he is still unable to be stored in the Persona Compendium for later summoning and will require fusion once again to make.
While Izanami's fabricated goddess form bears a resemblance towards Izanagi-no-Okami, having a white-ish color theme, her true form, Izanami-no-Okami takes the form of a rotting, death-ridden form, similar to the Japanese mythology.
Izanagi-no-Okami, along with Palladion, returns as an Instant Kill. Similar to Pallas Athena, Izanagi transforms into Izanagi-no-Okami for Yu Narukami's fatal attack. Like Palladion, however, Izanagi-no-Okami cannot be accessed by his host outside his Instant Kill, Myriad Truths.
Immediately after both the P3 hero and P4 hero reach level 55, the request, The Power of the Wild Card, becomes available. The request for just the two Heroes to fight Margaret in You in Wonderland Chapter 3. Immediately after the fight, Orpheus evolves into Messiah and Izanagi evolves into Izanagi-no-Okami. Due to the two Wild Card users being brought together, similar to everyone being able to equip two Personas, once the two heroes attain their ultimate Personas, everyone else is able to as well, with their Personas evolving once they reach level 55. Each ultimate Persona only has one skill unique to it, Izanagi-no-Okami's being Heat Riser, which greatly raises one ally's attack, defense, hit and evasion for 3 turns.
Unlike the ultimate Personas of the protagonists from the previous series, Izanagi-no-Okami holds the largest fusion prerequisite to summon. Apart from completing the True Ending event in the previous cycle, the protagonist must also perform a Dodecagon Spread Fusion in the Velvet Room (which becomes available July, 11th) with specific Personas to summon Izanagi-no-Okami:
In Japanese the skill "Myriad Truths" is literally translated as "Many Myriad's True Words" (幾万の真言?), and Izanami's skill "Thousand Curses" is actually "Many Thousand's Curses" (幾千の呪言?). The two skills most likely parallel Izanami's curse and Izanagi's vow in the original Japanese myths, where Izanami swore to kill 1,000 mortals a day and Izanagi countered by vowing to give life to 1,500 mortals a day. "Myriad" is also an archaic word meaning "ten thousand."
While using cheats to get the full compendium in Persona 4, there are 5 extra slots in the compendium: 034, 0B4, 0B5, 02B (these four slots are in the Fool Arcana) and Izanagi-no-Okami. His slot is the very last one right after the Judgement Arcana, and it is labeled "World," he starts out at level 0 and he has his own info. However, he still cannot be updated.
Yu's ultimate weapon, Blade of Totsuka, bears close resemblance to Izanagi-no-Okami's weapon.
Izanagi-no-Okami appears to be wearing a suit and tie, whereas Izanagi seems to be wearing a shirt and open jacket, much like the Yu's fashion of wearing his school uniform; this could be symbolic of "growing up" from a student to a serious worker.
In Persona 5 Royal, its name is written in Kanji instead of Katakana.