In Slavic folklore, the legendary creature known for its transformative abilities is the rusalki, often depicted as beautiful women. These water spirits can embody both enchanting and perilous traits, reflecting the duality of nature. They are often associated with the water and natural beauty, but their transformative qualities can lead to both benevolence and danger. The rusalka's ability to change shape highlights themes of feminine strength and the fluidity of identity, representing the intersection of beauty and peril.