A dramatic tool used for exposition and general mood-setting. Makes use of one or more anonymous players who discuss the general state of affairs in the kingdom. They may communicate with the principal characters as well.

The Greek chorus is still used today. The example that springs to my mind first is the Newscaster who comes on to conveniently discuss an arrest/murder/election that affects the plot.

Depending on who's directing, members of a Greek chorus may hold multiple roles during a performance.