It was mostly a response to Vesth, as he seems to be the one bringing a third party into this, but the narrator could be this person. . . and we now get your little joke.
But with the mysterious more than likely still living and having not killed, it probably disguised someone. So we should be meticulous in choosing a lynch subject, anyone have information on the suspects or those that claim them to be evil? this is asking the suspects to give all information they are willing to share.
I personally doubt they'd try and do that, there's just way too many better uses for their night power then to disguise lex as not town. Expecially since either Lex is unkown to them (so could very well be evil/neutral) or a mysterius, so it'd have been better to disguise her as town, I think.