Board Thread:Speculation House/@comment-39677156-20190628195553/@comment-5430952-20190710223038

Same, no way the Beacon mole would bother with such nincompoops, as Mega said they're nothing more than mere bullies, they're not a threat to anyone at this point.

And from the way Salem spoke to him/her, it sounds like the mole can also control Grimm, otherwise they wouldn't be able to summon more to a)find the Relic, and b)thwart Glynda's attempts to rebuild the school.

As for the second empty seat, that could belong to "the Crown" from After the Fall, who's still at large somewhere in Vacuo, provided said individual isn't Salem herself.

Those would be my best guesses anyway,