Margaret Cavendish crossed the 17th Century`s literary convention and gender line by challenging a Utopian narrative and publications which had long been prohibited against women writers. Although the methods such as imperialism, patriarchy, and heterosexuality applied in the text, The Blazing World (1666), seemed quite paradoxical in the feministic perspective, the double strategies that she used should be an effective way to represent female subject under the repressive and male-centered English cultural milieu of that age. Thus, the "self-effacing mask" that she wore covers her resistant discourse and subversive ideas in the fictional world of Utopia, where women protagonists build worlds of their own based upon their own rights, desires, and ambitions without any obstacles. This paper argues that Cavendish`s "eccentricity" asserted in the text mainly implies two major points: 1) it represents woman`s unique world which is not necessarily identified with man`s. In order to represent her female self, Cavendish kept seeking to earn recognition and fame through her own particular public action and merit in her fictional world as well as in her real life; 2) it includes lesbianism and basically asserts separation from marriage and patriarchy as an institution and supports women`s independence, freedom, and autonomy against the patriarchical system. Lesbianism is, in nature, involved in politics because women in the phallo-centric world are regarded as sexual objects under hetero-sexualism as a dominant institution. Duchess of New Castle, the alter ego of the writer would never stop searching for her own right, identity, and ambition in the text. The loving companionship between the two women shows a kind of possibility to proclaim and recover women`s power by supporting and sharing each other`s need. In addition, they show that women just like men also have ambition to plan and govern the world by their own idea politically as well as culturally. Even though this argument may lead to a separatism which may bring another dualism, the bottom line of the argument is that she greatly needed to show and represent women subjects in the conservative society even by using both her masking and revealing strategies.