>>6429521Joker actually has a pretty well-defined personality for a silent protagonist. He purposely puts up a "normal student" exterior while actually being playful/mischievous. He's said to think a lot and he's more intense in his justice-seeking tendencies compared to previous Persona MCs. He's basically a quieter Lelouch without the full-blown gaudy bravado:
https://www.youtube.com/watch?v=pbTt0iz-Wvc Compare that to P4's main with Yu being an all-round "cool guy I'd marry my sister off to" who has abandonment issues, and as well as P3-kun's general autism and very detached personality.