A new Agatha All Along theory presents another idea about Aubrey Plaza's character's identity: comic book villain Lady Death.
"I see a lot of parallels with this story and that of [Puss in Boots: The Last Wish]," one Reddit user explained. "Both have a protagonist searching for a wish and running away from an imposing figure dressed in all black (ie death). Agatha is running away from death. Aubrey’s character has a "black heart that beats" for Agatha bc she has been avoiding death for so long due to her stealing the life force of other witches. What’s more damning is that in the official promotional art for the Agatha series with the tarot cards, lady death appears and is clearly holding the same knife that Aubrey Plaza’s character is holding in ep 1."
