I can tell you that the cast of P4 is pretty well represented in Dancing All Night so far, though I don't think I'm that far in yet. The new characters are kinda bleh, though, aside from Kanamin. It's nice to finally see her character after her being such a big part of Rise's S. Link and backstory in general.
Aside from the flanderization, Q is a really good game, just not sure if it's your style. Akihiko doesn't shut up about protein, but the rest aren't half that bad.