This article contains WandaVision spoilers, and may spoil future episodes, as well.

First introduced in WandaVision episode 2, Scarlet Witch and Vision’s neighbor (and unwitting magical assistant) Geraldine was a bit of a surprise appearance. Let’s get right down to business, because there’s a lot going on with the mysterious Geraldine.

Who is Geraldine, Really?

We’ve known since the show was in the casting stages that Teyonah Parris was playing Monica Rambeau. So when Parris showed up with a different name on the street, it was a big clue that something was up. And indeed it was: WandaVision episode 3 saw “Geraldine” opening some real cracks in the reality that’s been constructed around Wanda, before she was unceremoniously hurled out of Westview at episode’s end.

Who is Monica Rambeau?

Monica Rambeau does have some comics history with Wanda. Currently known as Spectrum, Rambeau was introduced to the Avengers as Captain Marvel.