Well I would like to post about what I DO know, which is Persona. A lot of possible roles could pop up here based on the Aracanas (tarot) and Personas (think Jojo Stands, or Shaman King) characters have in the game, I want to list some possible ones:
1. Fuuka (namedropped) - She is a Priestess Arcana and in the game Persona 3, she does not battle, instead, she can search for enemies locations, and their power. This leads me to believe she could be Tracker, Cop, Watcher, or maybe even Stalkerr, however shes is good in Persona 3, so probably not a mafia role.
2. Dojima - Unplayable character from Persona 4. Is a police officer/detective, so im guessing his mafia role would be Cop]/b]. (Katsuya Suou could be a Cop role as well)
3. Adachi - Villain from P4. Is a cop, that is actually evil. Im thinking Traitor, Stalker, Mastermind, something that makes him appear innocent to visits, he could be a lot of bad roles.
4. Rise Kujikawa - Protagonist from P4 who doesnt fight. Lovers Arcana, so Lover is a very likely ability. Roles that involve helping others due to her only scanning and helping with team attacks in P4 is a possibility. Hooker?
If anyone who doesnt know anything about persona would like some more guesses at what roles could be likely just ask, (or look it up yourself).
Muda Muda Muda Muda Muda Muda!!!!