On the note of P6 protagonist, if the leaks are correct on what the protagonist looks like, I really hope that theory that he's a foreign exchange student is correct. It would not only be a good explanation for why he is in a new school and staying in a new place, (assuming we follow the usual pattern) but it also opens up some fun avenues for characterization.
Like, there's a culture barrier that's two-fold. He is semi-frequently confused by things in the general Japanese culture, but he also does things that regularly baffle his native friends and he doesn't bat an eye.
And language. He speaks Japanes well for it being his second language, but he doesn't always get words right, he never uses contractions or slang, common sayings an expressions are lost on him. I'm just imagining this very dead-pan, expressionless guy who rarely speaks and he's just had an incredibly harrowing supernatural experience and he turns to his new friend and says, so seriously, "Wow. That really heebied my jeebie, am I right?" And his new friends/party members are like "Is this guy for real?" And he is. He is so for real.