Warning! This article contains spoilers for Agatha All Along Episode 6.
Agatha all along Episode 6 just gave the biggest hint about Rio Vidal’s true identity, hidden among the main reveals about Billy Maximoff. At the time of Agatha all along Episode 6’s ending, the show officially confirmed that Teen is named William Kaplan. William’s life as a young boy was outlined, from his Bar Mitzvah to his death in a car crash when the Scarlet Witch’s hex dissipated from the end of WandaVision. The soul of Billy Maximoff then inhabited William’s body, revealing how the character is now part of the journey down the witches’ road.
Naturally, the episode featured many reveals about Billy and was mostly without Agatha all alongThe other cast members. Regardless, there were some hints about the fate of witches like Lilia and Jen, although Aubrey Plaza’s Rio Vidal was noticeably absent. This harkens back to the theories about what exactly Rio Vidal is, with one Agatha all along Episode 6 Easter Egg offers the biggest clue to this mystery yet.
Agatha all along hints Billy Maximoff is the coven’s green witch
Billy Maximoff was the Black Heart, not Rio
when Agatha all alongThe witch coven was formed, Lilia Calderu wrote three names and a symbol for the four other witches who were destined to join Agatha and Billy Maximoff down the witches’ road. The list included Lilia’s own name, Jennifer Kale, and Alice Wu-Gulliver, with the symbol being a black heart. In the show, the characters first took the black heart symbolized the coven’s green witch, referencing Mrs. Hart / Sharon Davis and then Rio Vidal after the former’s death.
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It was a common theory from viewers that the black heart symbolized Ryo based on her comment about a black heart beating for Agatha in episode 1. However, Agatha all along Episode 6 may have revealed that it was Billy who is the Green Witch of the Coven. In a text from his boyfriend, Billy is told “You are my heart,” Only with the word heart showing as a black heart emoji. This implies that Billy, originally thought to be an acquaintance and not an official member of the coven, is actually the Green Witch.
Agatha all along Episode 6 also revealed that Lilia was the one who placed the seal on William Kaplan to hide the fact that he would eventually become Billy Maximoff from other witches. The show already confirmed that the sigil works on the witch who cast it, which explains why Lilia – an expert in divination and future vision – wrote a black heart for Billy rather than his name, which she was bewitched not to know by the sigil . If Billy is the black heart, this could confirm a Rio Vidal theory.
If Rio Vidal is not the Green Witch, who is she?
The most common theory about Rio Vidal is that she is the MCU version of Marvel Comics’ Lady Death. This was mentioned several times in Agatha all alongs first six episodes. in Agatha all along episode 4, Ryo mentions that once Agatha kills the other witches, she gets their bodies. This coincides with Ryo telling the coven that she once had to do her job causing the pain of someone she loved. This was clearly in reference to her and Agatha, with the theory being that Nicholas Scratch’s death saw Ryo take him as Lady Death, upsetting Agatha.
In the same episode, Agatha asks Rio “don’t take him” When Tin is injured before stating to Agatha “The boy is not yours,” Something she would only know for sure as Nicholas is dead. Rio’s off in Agatha all along Episode 6 also came after Alice’s death, another hint that Rio is Lady Death. Finally, in Agatha all alongs midseason trailer, Rio can be heard stating “All roads lead to me.” This could hint at the fact that everyone dies eventually, leading them to Rio and reinforcing that – along with Billy being the Green Witch – Agatha all along Includes the manifestation of death itself.