Izanagi-no-okami is a World Arcana persona who appears as the protagonist's Ultimate Persona when fighting Izanami.
Persona 4 Arena
Izanagi-no-Okami appears as Yu's Instant Kill move. Izanagi-no-Okami cannot be accessed by his host outside his Instant Kill, Myriad Truths.
Persona 4: Dancing All Night
Izanagi-no-Okami is summoned after completing Reach Out To The Truth against Mikuratana-no-Kami. Izanagi-no-Okami's instrument is a double neck guitar similar in appearance to his normal weapon. One neck is a bass guitar, the other is an electric guitar.