A collaboration between Persona 5 and Kyoutou Kotoba RPG: Kotodaman (iOS/Android) has been announced as part of a series of 1st anniversary collaborations in Kotodaman.
The collaboration will be held in March 2019, and will feature popular characters from the game. More details will be announced at a later date.
A teaser page for the collaborations has been opened here. In addition to Persona 5, collaborations with Attack on Titan and Neon Genesis Evangelion will be held as part of the anniversary celebrations.