Records of Croatian oral traditions and oral literature of other Slavic countries bear witness to the beliefs of ancient Slavs in the existance of various fantastic beings, especially those female, fantastic heroines, which are the subject of this final work. The paper gives an overview of beliefs about fantastic female characters: witches, fairies, mere and Fates, talking about their appearance, actions, influence on man, but also about his protection from them. It also describes beliefs about the way in which fantastic heroines were created, experienced and portrayed, given the different geographical locations that conditioned diversity of seemingly similar traditions. The focus is on oral traditions from ancient times that we can find today thanks to the numerous records of the testimony of tellers, created mostly from the 19th century to the present day. In this paper, the sources used are the texts of the authors who, by researching and writing down the narrations, have significantly contributed to the study of oral tradition as an oral literary genre, starting from Matija Valjavec and Ivan Kukuljević Sakcinski. Primarily, recent writings by authors such as Evelina Rudan, Luka Šešo, Vid Balog, Zoran Čiča, Radoslav Katičić and some other folklorists and literary theorists were used.