
I think he knows about his past too. Because if not, this scene wouldn't make any sense at all.

He probably said what he said to make fun of her at that time though. But my other question, does he know that she's also from the past? I think he also knows about that. But just to make sure... Does he? I mean, there's a lot that changed from the past, and if he didn't realize that, there's no hope. Ksksksksks
Leslie looks the same, she's just taller... Kind of disappointed. (〜 ̄△ ̄)〜