Duh, it's my thread. I enforce this shit.
Reiko, Kouichi's aunt, and Mikami are the same person. I think Reiko died a little while back, and that's why Kouichi came back to Yomiyama a few years ago, he attended her funeral. That's why Izumi recognized him, because she was also at the funeral. Spoiler for episode 9: And since Reiko was with everyone at the beach, that is why Nakao was killed there. Even though no one is supposed to die outside of Yomiyama.
Tuor: Stuff is our resident, hot mess, alcoholic.
Senel: Stuff is the patron saint of getting shitfaced. You replaced your organs with an engine that runs solely on alcohol.
Tuor: You foolish fools, no one can tame the stuffaluffagus!