After being the bad girl for so long, Baani finally did something to win many hearts by risking her own elimination for the sake of saving Anthony.
Just see how those two Raj and Poonam were conspirating against their own fellow Calcuttan Anthony, I really hate both Raj and Poonam. Poonam was hell-bent on ousting anthony who was so close to them before. Moreover just see Raj, that selfish stud how he just told straight to anthony that he should go when anthony was pleading for his friendship. Remember, in similar situation before, anthony had refused to vote out Raj on the context of friendship. I know this isn't a friendship contest but this shows who's a good human being and who isn't.
Baani on the other hand risked her own elimination by backing Anthony at a time when he needed her most and really paid back to anthony for all the support which anthony did to her. She could have easily agreed to Poonam's views to eliminate Anthony so that everyone else could have been safe including her but she chose to back anthony knowing well that could have invited that unlucky draw on which she could have herself got eliminated.