Though translated in the subtitles as "demon woman", they are referring to a specific supernatural being called a Churel. In South Asian folkloric tradition, aggrieved women who die in childbirth or at the hands of abusive in-laws come back as a demonic revenant creature called a Churel. Churel are shape shifters who cannot hide their backwards-facing feet. They typically take on the appearance of a beautiful woman in the trees who lures men into secluded forests to kill them and steal their vitality. A woman who returns as a Churel is said to target the male members of her former family first, in order to get revenge.
Within Hindu belief, Churels may become into dakinis (flesh eating female demons/ demi gods) and serve the goddess Kali, joining the goddess' routine in feasting on human flesh and blood.
Rahul Bose's first double role.