Lancel Lannister

Born around 282 AC, the eldest son of Kevan Lannister and Dorna Swyft, Lancel served as squire to King Robert alongside his cousin Tyrek — close enough to the king's household to be given tasks his family found more useful than honorable. Chiefly, at Cersei's direction, he supplied Robert with wine far stronger than his usual cup during a boar hunt that ended with the king gored and dying.

He also shared Cersei's bed through this same period, apparently believing himself loved rather than used — a confusion the text treats with more pity than judgment, since Lancel was young, ambitious, and entirely outmatched by his cousin's ruthlessness.

He fought at the Blackwater under Jaime's banner and Sandor Clegane's less patient one, and took a wound there severe enough that infection nearly killed him — an illness that seems to mark the beginning of a genuine religious turn rather than the merely convenient one some at court suspected.

He recovered to renounce both his Lannister inheritance and his betrothal in favor of the High Sparrow's Faith Militant, becoming one of the Sparrows himself — and, in the war's most pointed irony, one of the chief witnesses whose confession helps bring down the queen who once used him.