Who Is Agatha Harkness In Wandavision Explained ✖ WandaVisionepisode 7 has finally revealed the villain - and (SPOILERS) as many fans have suspected all along, it was Agnes (Kathryn Hahn). After luring Wanda over to her house and into her creepy basement, "Agnes" reveals that her name is actually Agatha Harkness, and she, like Wanda, is able to use magic. A little "behind the scenes" recap of WandaVision's episodes reveals Agatha magically willing a lot of the big events in the Hex bubble sitcom world - like "Quicksilver's" timely arrival. While this reveal is certainly a twist, mainstream viewers are now asking: Who is Agatha Harkness? Here's the Marvel Comics History you need to know for