Persona 5: The Phantom X Reveals Supporting Characters and Persona II, Producer Developer Comment - Persona Central

Perfect World Games have revealed further characters who will feature in the mobile game Persona 5: The Phantom X. 

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Persona 5 is getting a mobile spin-off with a new cast of

Persona 5 Tactica Characters - Every Playable Hero Revealed So Far

Persona 5 Tactica Characters - Every Playable Hero Revealed So Far

Persona 5: The Phantom X is a Full-Fledged Persona 5 Spin-off

Persona 5: The Phantom X announced for iOS, Android - Gematsu

Persona 5: The Phantom X characters use a Persona II power

Persona 5: The Phantom X Reveals New Characters, Artwork & Music

The game is likely a separate universe : r/Persona5

Persona 5: The Phantom X announced for iOS, Android - Gematsu

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Persona 5: The Phantom X announced for iOS, Android - Gematsu