Dev, very smart! He waited till K and A really whole heartedly are convinced he is Raju to start his play of finding out WHY they did this to him! Until they confess he will continue to make them beleive he is Raju since that is the ONLy way they will keep planning against him and give him room to exspose them. As for Kajjal, he wanted her to fall in love with this new Dev and he needed to be Raju so that K and A don't think he is Dev. Now it will get interesting since Kajjal has taken the last step to make him confess!
He will stop her from going to NT and confess that he is Dev and that they should now really play smart and expose those goons! We will get to see some nice romance.
Now I am really excited about this serial again!