This dissertation analyzes the case of Margarida Hirschmann, accused of treason and military persuasion due to her performance on Auri-verde, a pro-Axis content radio during World War II. Hirschmann acted as the announcer of this radio and, according to the Brazilian justice, was responsible for pronouncements in portuguese destined to the Brazilian military force (FEB), that had as objective to shake the morale of the troops and to convince them to desertion, appealing to lies and psychological terror during war. When captured, Hirschmann is brought to Brazil and judged by the Military Justice. During this period, the Brazilian mass media shows great interest for her case and, especially, for her appearance along with the crimes she allegedly committed. The beautiful spy, nicknamed given by the newspapers and magazines of the period, is condemned to 20 years of imprisonment. While in prison, she gives a series of interviews where she repeatedly denies the political motivation behind the case and engenders an immaterial construction of the difference, highlighting her own situation in relation to the other women in jail in the newly built Feminine Penitentiary of the Federal Capital in Rio de Janeiro. This immaterial construction of the difference is based on a series of gender stereotypes in dialogue with the socio-historical context in which the case takes place and, mainly, in dialogue with a certain sexual morality and ideal of femininity present in the construction of the modern woman. Newspapers and magazines will be used as the main sources for this dissertation, along with the text of the process of Hirschmann before the Brazilian military justice and the bibliography that discusses the historiography of women and gender problems.