1. Unassuming and Gentle: Mary is presented as a sweet, unassuming housewife, seemingly harmless and innocent. This initial portrayal creates a stark contrast with the shocking act she commits later. Her gentleness is emphasized through details like her "soft" voice and her "large, gentle eyes."
2. Pregnant and Vulnerable: Mary's pregnancy is a significant factor. It makes her appear more innocent and fragile, further reinforcing the initial impression of her harmlessness. Her vulnerability plays into the reader's surprise when she commits murder, highlighting the dangerous potential beneath the surface.
3. Devoted and Loving: Mary's devotion to her husband, Patrick, is apparent throughout the story. She is affectionate and eagerly awaits his return home. Her genuine love for him makes the ultimate betrayal even more shocking and disturbing.
4. Manipulative and Cunning: Despite her outward innocence, Mary exhibits a surprising level of manipulation and cunning. She cleverly conceals the murder weapon and uses her acting skills to mislead the police. This hidden intelligence adds to the tension and reveals a darker side to her character.
5. Emotionally Fragile and Desperate: While initially appearing calm, Mary's emotional state deteriorates throughout the story. This is evident in her increasing nervousness and anxiety as the police investigate. Her desperation to protect herself and her unborn child ultimately drives her actions, revealing a deep-seated vulnerability beneath her seemingly composed facade.
By showcasing these seemingly contradictory traits, Dahl creates a complex and ultimately terrifying character in Mary Maloney. She is both innocent and capable of violence, gentle and cunning, a loving wife and a cold-blooded killer, making her a truly unforgettable and unsettling figure.