Miss Lemon

Poirot's secretary, Miss Lemon, has few human weaknesses and the only two mistakes she is ever recorded making is a typing error during the events of Hickory Dickory Dock and the mis-mailing of an electric bill. Poirot described her as being "Unbelievably ugly and incredibly efficient. Anything that she mentioned as worth consideration usually was worth consideration." She is an expert on nearly everything and plans to create the perfect filing system. Interesting enough is the fact that she once worked for the government agent-turned-philanthropist, Parker Pyne. Whether this was during one of Poirot’s numerous retirements or before she entered his employ is unknown.