So all that's left are P4U2's Sho(nuff), Minzuki (Sho's "angry" variant), Margaret (IIRC), Junpei, Koromaru and Ken, and Mighty Morphin' Yuka-tan.
At that point, hopefully someone can mod it to be the P4U2 2.0 that PC players are missing because Atlus is dumb.