So we’re not gonna talk about who that missing person that Jimmy Woo was brought to Westview for to begin with? I mean, it’s Ralph. Has to be. Everything is pointing at this being Mephisto, or at least someone pushed Wanda over the edge. It’s been ~3 weeks since the end of endgame, and we last saw Wanda upset, but not thinking about doing something like this less than a month after her conversation with Hawkeye. Someone saw her at a very weak state mentally and took advantage by putting this idea in her head. Who else could it be? Grim reaper, and Nightmare are also possible, especially the latter given his connections to Doctor Strange in the comics.
The series is set in New Jersey. What is NJ known for with mythical beings? That’s right, the Jersey DEVIL. Mephisto.