(adjective) exceeding the usual, stated, or prescribed number / (adjective) not enumerated among the regular components of a group and especially of a military organization / (adjective) exceeding what is necessary, required, or desired / (adjective) more numerous / (noun) a supernumerary person or thing / (noun) an actor employed to play a walk-on
She had a great desire not to trouble or be troubled by supernumeraries and strangers.
like extras i guess?