Woh Kaun Thi

A renowned physician who stands to inherit a large estate only if he remains mentally stable. He becomes increasingly unsettled by uncanny encounters and a mysterious woman who seems to recur across time. His rational mind drives him to investigate the truth behind the haunting and the motives of his relatives.

A young woman who becomes Anand's fiancée and bears the burden of a twin sister's identity. Clues suggest she may be linked to the mysterious appearances, and her presence intensifies the romance and the mystery. Her interactions, coupled with the twin twist, escalate the stakes of the inheritance plot.

Anand's girlfriend whose death by cyanide injection triggers the entire mystery. Her murder shifts suspicion to others in the hospital circle and serves as the emotional catalyst for the investigation. She embodies a tragic love interest caught in a web of secrets.

Anand's colleague who loves him, adding emotional tension and complicating loyalties. Her care for Anand makes her a sympathetic figure, though the plot hints at possible involvement in the staged events used to secure the inheritance. She becomes central to unraveling who is real and who is part of the deception.

Anand's cousin and the mastermind behind the plan to render him mentally unstable to claim the inheritance. He orchestrates the haunting ruse with a network of accomplices, staging events to manipulate perceptions. His machinations drive the revelation of Sandhya's twin and the final confrontation.

The hospital's head doctor, a figure of authority who witnesses the deception and aids the investigative thread. He helps unravel the truth behind the staged hauntings and anchors the medical setting of the plot.

A servant who appears in the orchestrated scenes and is part of the network executing the plan. His role exemplifies how appearances can be manipulated to mislead the protagonist.

A henchman who aids in enforcing the scheme and confronting Anand. His presence adds danger and action to the climax as part of the criminal enterprise.