Santu's duffort character is the soul of Bandini. She is an illiterate rural girl. But is very innocent and don't want to hurt anyone and is not self centred. How she gave the idea of putting two diamonds instead of one when Hetain broken the most viable diamond and it worked. The entire Dharampur got a breather. So, her duffortness/silliness character will go on without a break. She didn't trust DM in the case of Vishal and it was an unpardonable mistake committed by her.