Mouni Roy is on a roll, as the actress in her early movie career is getting such huge and fascinating roles. Mouni will be next seen in Ayan Mukerji's Brahmastra. Talking about her character in the film, the actress reveals that she is playing the main villain in the film and she is really looking forward to it. The actress added that what is more liberating for her is playing different characters that challenge her. Mouni also revealed that she was initially surprised that the makers of Brahmastra wanted her to play the villain. Mouni further revealed, "Ayan Mukerji had seen something from Naagin and felt I could play the villain." Brahmastra also stars lovebirds Ranbir Kapoor and Alia Bhatt.