Since Vishi has given the update some points :-
Vansh even though hurt forgot abt the same when Ridz was late to reach home but the moment Ridz talks abt dhoka and walks off (which was an amazing scene ) he goes back into wounded mode again .
I feel the new mystery person could be Sia as dadi obviously has no clue abt Ragini so it’s only Sia woh Vansh can confidently confide .
Riansh takkar was amazing but Yaa now we know that Vansh is an amalgamation of Sia’s niceness and Ishani’s kameenapan.What he did to stop Ridz from leaving was horrifying and indeed Cv’s are exploring Vansh’s dark side .