Yes! Although Levi will be really curious about why they know. And be suspicious. And this could be interesting. So maybe at some point there could be some limited 4th walling?

I'm just slightly worried because he'll want to know everything (although there's not been a lot revealed in the manga that the characters aren't aware of in some fashion) but having someone know everything about their situation might make him actually internally question if what they're saying isn't actually true and they don't exist and wow existentialcrisis---

I mean usually he's pretty level-headed but I'm not sure I'm ready to go quite that far yet haha.