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Nasthalthia "Nasty" Luthor is daughter of Lex Luthor's older sister and an enemy of Supergirl. Conniving, manipulative, malicious and incredibly persistent as well as loyal to her uncle, "Nasty" constantly tries to expose the Girl of Steel's secret identity or at the very least make her civilian life miserable at large.

Nasthalthia was created by Mike Sekowsky, first appearing in Adventure Comics #397. (1970)



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