Beric Dondarrion
A lord of the Marches sent to bring the king's justice to the Riverlands, who became instead the outlaw leader of the smallfolk's own brotherhood.
A soul born at Blackhaven, sworn to The Brotherhood Without Banners.
The fuller tale
Season One
Sitting the throne, Ned sends Beric Dondarrion to bring the Mountain's head and summons Tywin to court.
Where they stand. King's Landing.
Season Three
The Hound fights Beric Dondarrion's flaming sword ÔÇö and Beric dies. Then gets up. Again.
How it ends for them
On the screen. Fell in the Long Night (S8┬ÀE3)
The Lord of Light's oft-returned knight spent his last resurrection the way the god apparently always intended: holding a corridor of wights off Arya Stark's back. The flaming sword went out for good, purpose served.
On the page. Gave his last life at the Trident (ASOS, ch. 82)
Six times the flame of R'hllor pulled the lightning lord back from death, each return leaving less of the man. At the Trident he spent the last of it, mouth to mouth, on a three-days-drowned corpse the brotherhood pulled from the river. What rose was Lady Stoneheart.
In the books Beric dies for the seventh and last time at the Trident, and no part of it is in battle. The Brotherhood pulls a woman's three-days-drowned corpse from the river ÔÇö Catelyn Stark, thrown to the water after the Red Wedding ÔÇö and Beric gives her the kiss of fire that Thoros cannot bring himself to attempt, passing the flame that has kept him walking into her. He stays dead; what rises is Lady Stoneheart, and the Brotherhood that follows her is his kindly court of the hollow hill curdled into a hanging judge. In the show he spends his last resurrection at Winterfell during the Long Night, taking wound after wound in a torchlit corridor to wall the dead off Arya Stark's retreat ÔÇö and when Melisandre says the Lord brought him back for a purpose now served, the story, for once, has no rebuttal: the girl he died shielding ends the Night King within the hour.
Their chapters, book by book
A Game of Thrones 1 chapter that name them
A Storm of Swords 1 chapter that name them
Where the page and the screen part
The show's Brotherhood is a band of likable rogues; the books' is a tragedy in institutional form ÔÇö founded on a dead king's justice, slowly corrupted after its founder's final gift into something that hangs first and tries never, under a leader the show chose not to create. That choice is the great divergence: book Beric's ending is inseparable from Lady Stoneheart, and cutting her rewired his entire meaning ÔÇö the show's Beric becomes an instrument of the Lord of Light's long game against the dead, while the books' Beric is a cautionary miracle, proof that what comes back is never all of what went in. The show also softens the Brotherhood's low point: selling Gendry to Melisandre is its invention, book readers note, and rather against the books' Beric's character ÔÇö though the books' Brotherhood ends up somewhere worse.
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.