"In Slavic mythology, a rusalka was a female ghost, water nymph, succubus or mermaid-like demon that dwelled in a waterway. According to most traditions, the rusalki were fish-women, who lived at the bottom of rivers. In the middle of the night, they would walk out to the bank and dance in meadows. If they saw handsome men, they would fascinate them with songs and dancing, mesmerise them, then lead the person away to the river floor to their death.
While her primary dwelling place was the body of water in which she died, the rusalka could come out of the water at night, climb a tree, and sit there singing songs, sit on a dock and comb her hair, or join other rusalki in circle dances in the field. Though in some versions of the myth, the eyes shine like green fire, others describe them with extremely pale and translucent skin, and no visible pupils. Her hair is sometimes depicted as green or golden, and often perpetually wet. The Rusalka could not live long on dry land, but with her comb she was always safe, for it gave her the power to conjure water when she needed it. According to some legends, should the rusalka's hair dry out, she will die."
References for the background: [link]
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