P3 definitely isn't American - he has an accent. I always think everyone has an accent, so I'm not a good judge of where he comes from, though, but his is noticeable.
P3 showed up with the 1104s and then 804 showed up. 804 looks ratty, like he's broke, and he doesn't seem like he'd play a piano elegantly. P3 looks at Mrs. 1104 like he thinks she'd taste better than Thanksgiving turkey, and 804 follows Mr. and Mrs. 1104 around on the forums and gives them vague, unsolicited warnings.
601 is new in this whole dramafest, I think. He was the wolf in the dream, 601, remember? I've just seen him with 804 a few times, and they spend inordinate amounts of time locked in each other's apartments. His apartment is easy to get into, so that's my next course of action.
P3 says 804 has a grudge against him, but I wouldn't take his word as law.
If we can't use greetings on e-mails, why are we allowed to sign them?