In todays episode Rajveer gets a small clue about Naina's surname.
When Rajveer has conversation with cadets in the canteen, Naina gets a parcel. She runs and grabs the parcel and goes away from there.
On the parcel" Naina sigh Ahluwalia" is written. She tears the name card and throws it down..there comes Rajveer and he asks Naina what's the problem..She says that she got a cake from her friends and says that they said it on the occasion of her joining the army ..After she leaving, Rajveer sees the card and picks it up and reads " Naina Singh AH" .