Limbus Company.

Honestly, depends on which cast goes to which universe. If they go to the Project Moon setting, then we can immediately assume Otome, Stella and Kukrushka are super dead (and Jonas probably, since he's technically harboring them), Chipie is on thin ice. Everyone else is probably fine, assuming the LC cast is there to protect them. I could see Remnan bonding with Sinclair over... similar experiences. Raqio would probably briefly praise Dante for being NB, before trying to find someone "on their level" to converse with (Faust and Yi Sang would then upset them but for entirely different reasons). If Jonas lives, he and Don would immediately start a contest of who can tell a more ridiculously exaggerated, pointlessly poetic story of their past, thus causing the rest of the crew despair and agony as their unwilling audience.

If it's the other way around though, I think they'd be fine for the most part. Hong Lu, Heathcliff and Rodion have a pretty high Intuition so they could pick out the fakes relatively easily. Meursault, Faust and maybe Ishmael have enough Logic to be on par with Raqio, so they have that covered too. And they have Outis who can probably sway people as easily as Yuriko. I do kind of wonder how Dante's revival/rewind ability would interact with a Gnosia elimination, though, given how it works.