Narcissism is a factor in trait theory used in various self-report inventories of personality such as the Millon Clinical Multiaxial Inventory. It is one of the three dark triadic personality traits (the others being psychopathy and Machiavellianism). Except in the sense of primary narcissism or healthy self-love, narcissism is usually considered a problem in a person's or group's relationships with self and others. Narcissism is not the same as egocentrism. The term "narcissism" comes from the Greek myth about Narcissus (, ""), a handsome Greek youth who, according to Ovid, rejected the desperate advances of the nymph Echo. This caused Narcissus
Narcissus (mythology) minor antagonist in the third book "The Mark of Athena". In the fantasy series "Harry Potter", Narcissa Malfoy, a minor antagonist, is named for Narcissus. William Faulkner's character "Narcissa" in "Sanctuary", sister of Horace Benbow, was also named after Narcissus. Throughout the novel, she allows the arrogant, pompous pressures of high-class society to overrule the unconditional love that she should have for her brother. Hermann Hesse's character "Narcissus" in "Narcissus and Goldmund" shares several of mythical Narcissus' traits, although his narcissism is based on his intellect rather than his physical beauty. A. E. Housman refers to the 'Greek Lad', Narcissus,