Who the Eff Is Annabelle? 7 Theories About Cruel Summer's Latest Mystery

To keep Kate hidden under his roof for as long as he did, are there any chances that he appointed help to accomplish that? Likely a person named Annabelle? Since Kate was heavily under the influence of psychedelic drugs, it's a possibility that that's the reason why she couldn't piece together every part of her story. If so, where did Annabelle go? Did she flee before Martin was caught, or did she fall prey to Martin's sinister motives? Or is she still blending in among the town's people?