Lancel Lannister
Tywin's nephew and King Robert's squire, an eager, pliable young man forever trying to be of use to someone more powerful.
A soul of House Lannister, born at Casterly Rock.
The fuller tale
How it ends for them
On the screen. Died when the sept burned (S6┬ÀE10)
The cousin who shared Cersei's bed and then found the Faith followed a child into the tunnels beneath the Great Sept, and crawled with a cut spine toward the candles burning in a lake of wildfire. He was an arm's length short.
He dies in the show as the Faith's last errand-runner. Sent to fetch Cersei to her trial at the Great Sept, he follows one of Qyburn's little birds into the tunnels beneath it and finds the cache: casks of wildfire in a black lake, candles burning down toward it. The child puts a knife through his spine, and Lancel ÔÇö legs dead, arms working ÔÇö drags himself across the stone toward the guttering candles, an arm's length short when the flame meets the green. The explosion that vaporizes the sept, the High Sparrow, the Tyrells and his own father begins over his outstretched hand. In the published books he is alive, a Warrior's Son in a standing sept, his story open ÔÇö the novels' Lancel has confessed his sins but not yet paid anyone else's.
Their chapters, book by book
Where the page and the screen part
Book Lancel's conversion runs deeper and stranger. Married off to Amerei Frey and granted a lordship at Darry as a war reward, he abandons wife, lands and inheritance entirely to join the Warrior's Sons ÔÇö the Faith's revived knightly order ÔÇö over his father's stunned objections, and his confession of sins to Jaime, delivered on his knees in a sept, is one of the books' quietly devastating scenes: Jaime, hearing his sister's adulteries recited by yet another man, begins his own turn away from her. The show trims the marriage and the order, keeps the informer role, and adds the finale errand the books never reached. As of the published novels Lancel is alive, praying somewhere in a city that has no idea what is coming.
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.