Well, by Turn 18 at the very latest, I guess...but that would give them eight episodes, counting Turn 18. Maybe 9 (with Turn 17) if we're lucky. But, Monica...I mean, there were a list of spoilers posted a while ago without real backing, but they looked the slightest bit credible, and it says in one of the Turns that
by Jeremiah. I mean, what? Four, five episodes after her possible introduction? What the hell, Taniguchi?