I like to think (and want to believe) that all "mascots" are connected to the park's main server, or technically Rambley's. By that, I mean that the organic "suit" creatures would have some cybernetics connecting their minds to the AI system.
Since Mollie's physical monster form is currently dead, and she's still getting lines in the next chapter, I want to believe she's in the computer system with Rambley. And we haven't seen Rambley's monster form yet, so that could mean he's dead as well.
Perhaps the Rambley monster was involved in what shut down the park to begin with. And maybe he died just before they decided to close.
