Jester
A jester was a type of clown, often associated with a royal court.
Time traveller Boswell Boliver was forcibly made her new royal jester by a medieval Queen after his plans to obtain the awed respect of the denizens of the past fell through. (COMIC: Dr. Who's Time Tales)
The Trickster was a jester of the Kinda on Deva Loka. His role was to defuse situations of potential conflict. (TV: Kinda)
Death's Head unwittingly discovered the Seventh Doctor portraying a jester in a Brighton pantomime, but the Time Lord was able to get off stage before the robot mercenary could find him. (COMIC: Time Bomb!)
The Eighth Doctor claimed that Henry VIII mistook him for a jester. (AUDIO: Terror Firma)
On 4 March 1215, a jester juggled for King John, making him laugh. (TV: The King's Demons)
On 17 June 1462, Radu the Handsome mistook the Fifth Doctor for a jester. (AUDIO: Son of the Dragon)
In 2009, Elijah Spellman told Sarah Jane Smith that mankind had always needed someone to make them laugh, slave or king. In Great Britain they had fools like the harlequin and, in the Middle Ages the jester. (PROSE: Day of the Clown)
When trying to ascertain his place in the New Dalek Empire's hierarchy, the Tenth Doctor taunted Davros by asking if he was the Supreme Dalek's "court jester", eventually settling on the interpretation that he was instead "the Daleks' pet". (TV: Journey's End)