P4's MC = P3's MC: Too early to tell since we know so little about P4's. Those glasses are stylish as fuck though.
Knife guy = Junpei: Both are the comic relief characters, but Knife guy seems like it'll be more in a clumsy way rather than Junpei's goofy way.
Martial Arts girl > Yukari: I just think she's cuter. Plus, she uses fucking Chinese martial arts....that's hot and hardcore.
Rich girl < Mitsuru: Nobody can top Mitsuru....nobody.
Skull dude > Akihiko: Akihiko had class, but Skull dude just looks like a total fucking badass. He has no set weapon; Fist, chains, chairs, whatever the fuck he can get his hands on to beat someone down with.
Pop Idol = ?: Dunno who she related the most too.