Missandei had been a trusted advisor and close friend to Daenerys Targaryen since she freed her from slavery in Season 3.
However, the most pressing of these was one the show's creators probably hadn't planned for: was that a Starbucks coffee cup?
Williams also weighed in on the moment, telling HBO: "Reading what I get to achieve, Arya's whole goal in this world and everything she's trained for comes down to this one episode". The scene is now caffeine-less on HBO Go, which streams the show in the US.
HBO took the onslaught of memes in good humour, acknowledging the error with a tweet from the official Game of Thrones account.
"Things can get forgotten on set", he said.
We're now in the dreaded lull between Game of Thrones episodes, the worst part of the week.
Interestingly enough, the coffee cup wasn't from Starbucks at all.
"Game of Thrones" is in its eighth and final season, airing Sundays on HBO.
None of the leaks have been substantiated yet, but many viewers are still pretty angry.
Bernie Caulfield, one of the executive producers of HBO's global hit television series, apologised to fans.
"We're surprised (the character in the show) didn't order a Dragon Drink", Starbucks said of its pink concoction with sweet mango and dragon fruit flavours. However, it was later confirmed by HBO that the cup left in the shot was actually from a local shop in Banbridge in Northern Ireland, which is near where the production was taking place at that time.
The cup is now gone when streaming Game of Thrones on HBO Now and HBO Go.