Fool

A fool or jester is a performer employed to provide entertainment to members of a King or lord's court.

Known fools

 * Dontos Hollard, known as "Dontos the Red", a knight stripped of his title and forced into the role by King Joffrey Baratheon.

In the books
In the A Song of Ice and Fire novels there are several fools besides Dontos Hollard. Moon Boy is the other resident fool at the Red Keep. Butterbumps is the obese fool of House Tyrell. The mad Patchface, a former slave at Volantis, is the court fool of Stannis Baratheon, having been purchased and made free by Lord Steffon Baratheon during the time of the Mad King. Meanwhile, Lord Walder Frey employs his own lackwit grandons, Aegon - son of Ser Stevron Frey - who is dubbed "Jinglebell".

Due to their lowly status, fools are in the perfect position to overhear secrets, as they are often ignored by nobles.