Or perhaps, just to Miyamoto, whose assistant saw Lottie as a dangerous crazed fan who must be kept away from the master detective who instead saw her as a potential heir to his legacy…if we can trust Maki’s story and that she wasn’t just making a cover for herself as the jealous detective’s assistant worried of being replaced by Charlotte?

So this might actually have more to do with Miyamoto than Charlotte and replacing her was just a means to some end (that is now a loose end/vendetta possibly because things didn’t go Bad Charlotte’s way at some point previously?)

We’ll presumably find out eventually but its worth considering.