Cassandra Hartz is, to coin Gabriel Whitting, New York's finest madam and one of several informants available to Marcus Reed. She runs a brothel that caters to a variety of clients, including diplomats, dignitaries and businessmen (legitimate or otherwise) and uses this to gain valuable information that she is willing to part with for a small favour. Most of her missions involve "satisfying" clients or ridding her operation of problems such as stalkers or paparazzi.