I won't quote the entire thing but this strikes me as
highly suspicious. Either that or you're being painfully honest. To those of you who believe the latter, then rest of my post will be for naught.
But if the former, then it's quite counterintuitive to write you off as a sinner. There is no way to confirm whether a demon or not is sealed inside of you, as even yourself does not know that. If there is a sealed demon, then surviving alone will not warrant a win.
You seem to be placing a lot of emphasis on making sure no one recruits you. From what I can discern, this is a mask for a very powerful role that you hold, made more suspicious by your guarantee that nothing will come out of killing or recruiting you. Even Sin gets something out of killing you, even if you are a demon-less Sinner.
This could mean you're in a position not able to be killed or recruited the first time. Brilliant move, if that's the case, as if someone indeed tried it tonight, it would add credit to what you say, though you risk garnering suspicion at the same time. Or this could be a bluff to stave off an early death/reveal of your role. But who knows.