Ganga's sister Jamuna alias Bhavna, who also worked in the ashram is also wanted in this case, said Asthana.
Ganga has been accused of abetting the sexual assault, and threatening the victims besides helping Narayan Sai in his nefarious acts.
Sources say, two top associates of Narayan Sai - Kirit Naik and Monica Agarwal have links with some Gujarat police officials, who provide them with details of the probe. Monica Agarwal acts as a shadow for Narayan Sai, while in hiding.