I don't like revealing the whole thing to the locals in a game-based isekai. It's exceedingly demeaning for them, to hear they are just magical creations based on a book, or a "game" they couldn't understand with their current level of technology. Unless that was the whole point and they could be somehow saved into the real world. But that'd be more like xianxia stuff. From the nameless black company employee's perspective, it means she really considers all those people nothing but game characters, just like the original player character, also a reincarnator, seems to be doing. Neo-Lunaria is no better. She loves the original Lunaria character, but that's only as her favourite character in her favourite game. She doesn't really give a shit about all these other people. They are just game characters for her, and thus she feels like she doesn't need to allow them to retain their dignity as living people. Rather, she would do anything she needs to do to get her in-game revenge for Lunaria's sake.
She actually is a villainess, unlike the original Lunaria, who was a victim.