A character who creates humour in a play is a

A character who creates humor in a play is a clown. A clown is a type of character in literature, especially in plays, who is known for their humorous or comical behavior. They often use physical comedy, witty remarks, and wordplay to entertain the audience and lighten the mood of the play. The clown's main function is to provide comic relief and contrast to the serious or dramatic elements of the play. They may also serve as a social commentator or critic, using humor to expose the foibles and flaws of the other characters. The use of a clown in a play can add depth and complexity to the characters and the plot, and can make the play more engaging and entertaining for the audience.