WHO THE GHOST MIGHT BE?

I have a feeling that its Manju bua aka Manjulika herself. Out of spite that she couldn't reach the temple despite being a pure devotee of Shivji to see her soul mate but Sandhya could, she is attacking her and wants her soul mate. She was so eager to marry and find her life partner. So its possible that she is haunting everyone as the unfulfilled/atript atma.

Another theory could be that she/or whoever the ghost is, was never killed by temple ghosts rather, by humans. It could be the Jindals. So she is trying to possess Sandhya to marry Angad and ruin his family. 

interesting dynamics...

the reason is unsure though but it has something to do with angad's family or angad himself...both spirits are trying to separate SanGad....its obvious

interesting! I am literally dying to see a backstory or reincarnation story of Namik and Yogita's characters. Not many know she met him as a fan during ek duje days . Like adore that girl .