The Wednesday after she meets Mallory, when the witch-induced spike in crime seems to be wearing off, Tobi heads out.
She doesn't like to stay in one place for too long, even if she doesn't have a new target; she told her parents she was "travelling" after graduating high school, and actually moving around a lot makes that a bit less of a lie. Mallory has her number and she has Mallory's; they can get in touch if one or the other of them is in serious danger. She thinks she might head back around to Jackson some time, see if the League stays together.
But for now, she's heading northeast, toward Nashville.