Ilse Koch
The prisoners at the concentration camps called Koch Die Hexe von Buchenwald ("The Witch of Buchenwald") because of she would act cruelly and sexually towards prisoners at the same time.  In English, she has also been called "The Beast of Buchenwald," the "Queen of Buchenwald," the "Red Witch of Buchenwald," the "Butcher Widow," and, most often, "The Bitch of Buchenwald."