neither Waseem nor Anjana..

i believe it is Arshad... probably he left amiably so that no one would doubt him... or if he is a gentleman in the true sense of the word, then it could be his mom... somehow I feel it is Arshad... psycho Anjana would not risk her son's life... she would attack Zoya in isolation...

It could be Rajveer Arshad or a new villain..

Not Arshad for sure.

It looks like Anjana is behind all this but I doubt there is somebody else too who's involved in this.

I think Anjana is just sent someone to watch Adiya and know everything about them.