Sid , throwing all of Riddzie's insults , slaps, arrests and whacks to the winds restored her honour and dignity back to her in the best way that he could. Not once did he mention to Riddhima or anyone what he went through and suffered because of Riddzie's blind prejudice. He simply did what his conscience told him - cleaned out Riddhima , willingly taking everybody's wrath and leaving Sanjivani.
It is easy to side with a woman when her honour is at stake , feel bad for her , whine like weeping willows but a man's honour stands equally vulnerable. And Sid ripped it apart for Riddhima's sake.
Not even once did Riddhima think why Sid did what he did. Not even once she tried to look inside herself. She was the queen of prejudice 2.5 years ago and the same holds true today as well.
Siddhant emerged a better human-being , a braver human-being and the finer species of the two. By doing what he did not need to do and rising to the occasion like a responsible and gutsy man , Siddhant has bypassed Riddhima. He is every inch a one up on the ever self-sympathetic Riddhima and she can never better him.
If it was a war indeed, Sid is clearly the winner.