The correct answer is Character, one of the 8 basic elements of drama.
Queen, court, servant, and villagers are all people in the story. It is true that court is a place, but since a court is made up of people, we would consider it character. The answer is not so cut and dry though. This may also contribute to Plot, if the rank of these individuals is significant to the story. It may also be a characteristic of Setting, if the placement of the character is significant to the story.