Jackson's last novel, We Have Always Lived in the Castle, combines many of her most vital concerns-psychology, isolation, and evil-with a curiosity in black magic. Merricat, Jackson"s main character, is a young girl with many psychopathic tendencies including obsessive behavior and murder. Merrycat"s murder of more than half of her family is explained by her severely neurotic behavior. Her psychotic behavior can be seen though her obsessive habits, her almost childish mind, and murder of her family members.

             Merricat is extremely superstitious person that causes haunting compulsive actions. She thinks the number three is evil, buries things in her back yard to blockade the world, and trusts no one except her sister Constance. She believes she can feel omens, "All the omens spoke of change. I woke up Saturday morning and thought I heard them calling me." (Jackson 58). This superstition causes her to behave in mysterious ways. She burns down their house in order to rid herself of Charles whom she believed was evil.

             Merricat murders her family at the naive age of twelve and does not mentally age since that night. As an eighteen-year-old young lady she seems immature, .

             estranged, and even foolish. From the beginning of the novel the simplicity in her tone seems childish, "I dislike washing myself, and dogs, and noise"(Jackson 1). Maturity is the ability to control anger and settle differences without violence or destruction. This is not something Merricat handles well. After she is angered by Charles" unwillingness to leave their home, ".I hammered with a shoe at the mirror over the dresser until it cracked across"(Jackson116). Merricat does not have the ability to live in peace with what cannot be changed, or the courage to change what needs to be changed. .

             At the end of the novel, Merricat is a bland and apathetic character. Although Merrycat had been victim to a less than caring environment, killing is not a normal response.