Teresa is a troll-whisperer. For some reason, she can spot irredeemable trolls and separate them from the merely unsocialized. She can keep discussions calm and moving forward. She knows when deleting a troll's message will discourage him, and when it will only spark a game of whack-a-mole.
Teresa calls it "having an ear for text" and she is full of maddeningly unquantifiable tips for spotting the right rod to twiddle to keep the reactor firing happily without sparking a meltdown.