Sega announced on November 2 that mobile RPG Kotodaman is holding a collab event with the Persona series. As you can witness, all the Persona series is featured, with Persona 3, Persona 4, and Persona 5. We have Persona 3's protagonist, Aegis and Mitsuru, Persona 4's protagonist, Yusuke, Chie, Kuma and Yukiko. Lastly, everyone from Persona 5 is included too. Side characters and bosses are featured as well. Still on November 2, a live stream happened showcasing all the ultra cute SD illustrations of the event. The collab will be starting in game on November 4.

A trailer for the Persona collab in Kotodaman was shown on the live stream at the 08:36 timestamp:

Most people don't care or haven't heard about it, but Kotodaman is one of the most popular mobile RPGs in Japan. It's published by Sega and as such regularly has collab events with other Sega owned IPs such as Persona.

It's now been a year since Persona 5 The Royal first launched in Japan, on PS4, on October 31, 2019. The sequel Persona 5 Scramble The Phantom Strikers is available both on PS4 and Switch in Japan. It's a sequel to the original Persona 5, not taking into account the additions from Royal. Persona 5 Scramble wasn't announced in the West yet but it'll obviously come over at some point.