Thoros of Myr
A fat, hard-drinking red priest of R'hllor with a fondness for flaming swords, riding with the brotherhood in the war-torn Riverlands.
A soul born at Myr, sworn to The Brotherhood Without Banners.
The fuller tale
Season Three
Once the red priest attached to Robert Baratheon's court, more interested in the wine cellar than the Lord of Light, until the war he used to preach about arrived for real and left him stranded in the Riverlands with nothing left to hide behind. He has become the genuine article by the time Arya meets him — the man who pulls Beric back from death with prayers he still half-disbelieves even as they keep working, four times, five, he has lost the exact count. He officiates the trial by combat between Beric and the Hound with the weary competence of someone who has done this exact thing too many times, and when Beric falls, kneels over the body and does it again.
Season Six
Turns up with Beric and what remains of the Brotherhood just as the Hound is about to be overrun by men who broke off from their own company to keep burning and hanging in Beric's name after he stopped sanctioning it — men Thoros plainly recognizes, and plainly has no patience left for. He sits by the fire afterward while Beric makes the pitch to Clegane about the Lord of Light and the war still coming, adding little beyond a flask and a shrug, a believer who stopped needing to sound like one a long time ago. When the Hound falls in with them, Thoros leads the company north toward the Wall, the flaming sword traded for the moment for a bottle passed hand to hand.
Season Seven
North of the Wall with Jon Snow's company to snatch a wight for proof, muttering about how a lifetime spent drinking Robert Baratheon's wine cellar dry never once prepared him for this. When a wight bear crashes into the camp in the dark, it gets him before anyone can burn it back — he goes down fighting, and this time there is no Lord of Light left standing over him to say the prayer. Beric buries him beyond the Wall, one resurrection short of his own, the debt finally called the other way after years of paying it out.
How it ends for them
On the screen. Died beyond the Wall (S7·E6)
The red priest who brought Beric back nineteen times took a wight bear's jaws in the blizzard beyond the Wall, and the cold finished what the claws began. There was no one left to say the words over him.
His death belongs to the show alone. On the wight hunt beyond the Wall, in the whiteout beyond Eastwatch, the party is ambushed by an undead bear, and Thoros takes its jaws across the ribs saving the Hound. He is cauterized with his own flaming sword, drinks to the pain, and walks on — but the wounds and the cold work together through the night on the frozen lake, and when the dawn comes, the priest does not. Beric burns the body where it lies: with Thoros gone, the Brotherhood's resurrections are spent, and every life left in the party is down to its last. In the published books Thoros is alive — a diminished, grieving figure by the Brotherhood's fires, but breathing, with all his flock's darkest chapters still unwritten around him.
Their chapters, book by book
Where the page and the screen part
The show gives Thoros the ending; the books, so far, give him the aftermath. In the published books he is alive in the Riverlands, sidelined and sorrowing under Lady Stoneheart's leadership — he refused to give the kiss of fire to Catelyn Stark's body, a line he would not cross and Beric would, and the Brotherhood that resulted no longer answers to anything Thoros recognizes as the Lord's work. The show, having cut Stoneheart, promoted him instead into the northern war and the wight hunt, an expedition with no book counterpart. His backstory is book-enriched too: the tithed eighth son, the wildfire-sword tourney career, and the friendship with Robert are all page material the show only gestures at.
Their journey
Where the two tellings send them to the same place the road runs whole; where they part, the screen keeps the left and the books the right.