In WandaVision Episode 7, we learned a shocking (or not-so-shocking, depending on how deeply embroiled in fan theories you've been since the show's premiere) truth about Kathryn Hahn's Agnes. Surprise! She's actually been Agatha Harkness all along, and she even gets her very own theme song to prove it.

But, like many things in WandaVision, this reveal only served to raise more questions than it answered--namely: Who the hell is Agatha Harkness and why does she matter in Wanda's story? And naturally, while this is still very much a mystery for the MCU, we can look to Agatha's bizarre comic book history for clues.