One of Michelle, YTW and Hayumi i think.
Michelle is common link in Michelle-Hayumi 2vp discussion and in Michelle-YTW parity check.
Hayumi thread wise is really meh but scum having to publicly announce Lynch stop sound whack af. I even thought it could be a farce and she just write it in thread to look townier even though she activated it from scum chat but then no Lynch wouldn't be announced right after, right?
So probably Michelle. Then if she's regular scum - YTW, if she's GF or Town, probably Hayumi. I mean, depends on who dies at night and whether game is over at this point or not.
More or less sth like that.