The correct answer is: cardinal.
Cardinals are the second most powerful figures of the Catholic Chuch after its main leader, the Pope. Actually, the Pope is the only one qualified to appoint them. In order to become cardinal, it is mandatory that a man has been ordained bishop before.
The duties of cardinals consist on attending the meetings, and be available to the Pope if requested. Moreover, many lead a diocese or a deparment of the Curia in Rome.
