Hercule Poirot sort of obsessive-compulsive" in Poirot. As mentioned in "Curtain" and "The Clocks", he is fond of classical music, particularly Mozart and Bach. In "The Mysterious Affair at Styles", Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in "The Big Four". In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels,
Recurring characters in the Hercule Poirot stories and showing unwavering loyalty towards Poirot. When forced to choose between Poirot and his wife in that novel, he chose Poirot. The two were an airtight team until Hastings met and married Dulcie Duveen, a beautiful music hall performer he met in "The Murder on the Links". They later emigrated to Argentina, leaving Poirot behind a "very unhappy old man". A mystery writer who is loosely based on Agatha Christie herself. Poirot's secretary, Miss Lemon, has few human weaknesses. The only two mistakes she is ever recorded making are a typing error in "Hickory Dickory Dock" and the mismailing of