Ever since his release of Joker as a DLC fighter and the Persona-related content in Super Smash Bros. Ultimate, we have an another Persona series characters in this game. But we need a bit more.
List of characters were to ever be modded into Smash Ultimate and would they go over?:
Persona 3 - S.E.E.S.
Makoto Yuki/Minato Arisato/P3 Protagonist - TBA. Yukari Takeba over Pit/Dark Pit. Mitsuru Kirijo over Marth/Lucina. Akihiko Sanada over Little Mac. Junpei Iori over Ike. Shinjiro Aragaki over Ike. Ken Amada over Ness/Lucas/Toon Link. Aigis over Samus.
Persona 4 - The Investigation Team Yu Narukami/Souji Seta/P4 Protagonist over Marth. Yosuke Hanamura - Sheik. Chie Satonaka over Ryu (or possible SSF4AE/USF4/SFV Sakura skin mod port). Yukiko Amagi over Zelda. Kanji Tatsumi over Ganondorf. Teddie over Villager.
Persona 5 - The Phantom Thieves (except Joker)
Akira Kurusu over Joker. Ryuji Sakamoto/Skull over Captain Falcon. Ann Takamaki/Panther over Zero Suit Samus. Yusuke Kitagawa/Fox over Marth. Makoto Niijima/Queen over Ryu/Ken/Captain Falcon. Haru Okumura/Noir over Ike.