A 'Game of Thrones' actress dropped a potentially huge spoiler about Arya Stark and Jon Snow

Warning: Spoilers ahead for "Game of Thrones" season six, including speculation of future events.

"Game of Thrones" actors tend to be extra-careful during interviews these days, since superfans can draw conclusions from even the most cryptic of clues. The latest incident comes from Faye Marsay, the actress who portrays Arya's nemesis in the House of Black and White: the Waif.

Marsay appeared on British television program This Morning, where she had a very interesting conversation with hosts Phillip Schofield and Holly Willoughby about Jon Snow. 

Jon Snow, Arya Stark, and the Faceless men?

Schofield and Willoughby brought up the "secret" of Jon Snow's resurrection, and Marsay admitted that she was one of the few cast members who knew he was returning. But why? As Schofield pointed out to her, even Sophie Turner (Sansa Stark) didn't know right away. "But how did you know, because you're not even —"

Marsay cut him off: "I can't tell you how I know … I can't tell you." Schofield, clearly confused, prodded the actress a bit. "Is it like something to do with what's coming up?" he asked.

"I'm just going to leave that one there," Marsay said.

This could be major news. Logic follows that Marsay knew about Jon's return because the Faceless Men are somehow aware of the resurrection. Perhaps the show might go so far as to have Arya sent out on an assassination mission to kill Jon again. 

"I'm not in the same part of the country," Marsay said. "But anything can happen in 'Game of Thrones.'" 

Fan theories and clues

Anything, indeed. Even before Marsay's comments, fans had speculated that Arya could be tasked with killing her beloved half-brother. Why? People believe Arya will eventually return to Westeros. Having such a badass character like Arya actually shed her identity and remain in Braavos forever would be too anticlimactic. 

Three years ago, a Redditor posed the idea to the /r/asoiaf subreddit: "As we all know Arya is training to be a faceless man and [in my opinion] will soon be given a mission to kill one of the main characters. My question is who? I think it will be (tinfoil) Jon Snow ..."

But people weren't very receptive to the idea. First of all, in the books we know that Faceless Men cannot be hired to kill someone they know. This is just part of their code. Secondly, the motivation is shaky. Why would a Faceless man need to kill Jon Snow? 

In the books, Jon submits a request for a loan from the Iron Bank of Braavos. People thought perhaps the bank would hire the Faceless Men if he didn't pay them back, but that's a stretch. The loan hasn't even been given yet in the books, let alone needed collecting on. 

Another thin reason would be that the Many Faced God, the God of Death, commanded Jon be killed because his resurrection was unnatural, and Melisandre technically "stole a life" from the God of Death. But again, that's not very likely. We know other characters (Berric Dondarrion and Catelyn Stark) who have been reborn in the books, and so far no Faceless Men were sent after them. 

Which brings us to Ramsay Bolton. We know that Westerosi people are aware of the Faceless Men and the service they provide. In season one, Littlefinger proposed hiring a Faceless Man to kill Daenerys Targaryen on behalf of Robert Baratheon. 

The most logical reason for a Faceless Man to be ordered after Jon Snow comes down to Ramsay. The new Lord of Winterfell has a major reason to want Jon Snow dead, since Jon has now left the Night's Watch and intends on retaking Winterfell with Sansa by his side. If Ramsay hired the Faceless Men to assassinate Jon Snow, the task could very well fall to Arya.

If this is true, what will Arya do?

Let's assume this will happen. In the preview for episode five, "The Door," Jaqen asks Arya "Does death only come for the wicked, and leave the decent behind?" If theories are correct, he's referring to Jon as the "decent" person who death must come to. 

Then, episode six's description says "Arya faces a difficult choice." In what is probably not a coincidence, that episode is titled "Blood of My Blood." Arya's difficult choice could be the decision to kill her "blood," Jon Snow. But will she go through with it?

HBO's description for episode seven, "The Broken Man," has another vague hint about this plot: "Arya makes a plan."

We hope her plan involves not murdering Jon Snow, and escaping from the House of Black and White for good. She has her sight back, and based on episode three's training montage it looks like Arya is getting better at playing games with the Waif.

In the full-length trailer released back in April, Arya was seen leaping from the rooftop of a building. She was clearly being chased — perhaps by the Waif? (This image doesn't look exactly like Arya, but we know she used body doubles while filming season six.)

Then, in a follow-up trailer, we get an ominous shot of that same scene with Arya wearing a blue-sleeved tunic, smearing a bloody hand along a wall. 

Did she just assassinate a person while following the orders of the Faceless Men? Or did she kill the Waif as part of her plan to escape?

Then again, we could be speculating over all of this for no reason. Perhaps Marsay simply got a script that included the Waif telling Arya about the goings-on in Westeros, including Jon and Sansa's fight for Winterfell. Then, knowing her siblings are alive and battling, Arya decides she has to join the fray. 

No matter the storyline, we're guaranteed to see some interesting developments in Braavos coming up. Arya finally has her sight back, and is ready to get her hands bloody again. 

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