Alrighty. Without using flavor, this is what I've got:
Mikey's meta is that he never busses his scumbuds. Going back through his posts in ISO, Mikey townreads Ex, flip-flops on Sun, and susses both Naga and Giri. He tried to start a wagon on me. SMS and Jinjo don't have reads from Mikey as far as I can see, which makes Ex, Sun, SMS, and Jinjo top PoI at this point.
Jinjo I've been townreading since D1, and she hasn't given me any reason to doubt that read. Taking her off the list leaves Ex, Sun, and SMS.
Ex, I'm setting aside for last on the list because he did claim colors that lead me to believe he's a specific character. That aside, unless Sun can convince me he's the one that's been pocketed, I'm giving Ex the benefit of the doubt. That benefit flies completely out the nearest window should Sun flip green.
Between SMS and Sun, I think Sun is more likely to be the one pocketed. The biggest factor making Sun more sus than Ex is currently his vote on Jinjo which he admits has no good reason behind it. Town can't afford to mislynch assuming a worst case scenario, which Sun is clearly aware of, so that leans him towards scum.
Last, we have SMS who fought D1 to keep Ex from getting lynched and appears to have used a joke "protect Ex from D1 lynch" to wind up the widely-believed Cop, even though his voting record and other claim-related statements D2 don't back it up. He voted Rubik D1 then didn't vote for Mikey despite saying that he would (while simultaneously proposing a lynch on me if Mikey flipped green).
In short, SMS is the most suspicious to me because SMS and Mikey both dodged direct connections to each other.