It's almost inevitable this character will die on 'Game of Thrones' this week. Here's why.

Bad things happen to good people on Game of Thrones, so when a good thing happens, it can only mean one thing: Death approaches.

Grey Worm (Jacob Anderson) experienced one of the few joyful moments of an extremely difficult life on Sunday when he and Missandei finally consummated their love -- so, naturally, fans are terrified he's going to die.

The outlook was already bleak for our Unsullied leader. At the outset of "Stormborn," Daenerys and Tyrion lay out their battle plan, and it sends Grey Worm and his troops to capture the Lannisters' Casterly Rock. Missandei goes to see him that night, to wish him well and in hopes that he will confess his true feelings.

Eventually, he does, and we know what happens next.

Other characters who died shortly after fleeting happiness:

- Robb, Talisa, and Catelyn Stark - Ygritte - Oberyn Martell - Mycah, the butcher's boy - That slave owner in Astapor who got burned to a crisp

Ever since the show moved past George R.R. Martin's books, Game of Thrones has gotten heavy-handed with the foreshadowing, which diminishes the effect of major plot twists. Giving Grey Worm a night of bliss with the love of his life is almost certainly a joint sign-off on his death from David Benioff and D.B. Weiss.

We know from photos of episode 3 that Grey Worm is off on his mission, suited up and ready to defend Daenerys to the death. Is this the end for our fearless, loyal Unsullied leader? Maybe he'll survive by a hair, or maybe the Lannisters will be ready to defend their home. Maybe we'll light a bunch of candles and prepare some sad music...just in case.

Game of Thrones airs Sundays at 9 p.m. on HBO.