Whistle

A college student and lover of Jeeva who becomes a core driver of the investigation. She is perceptive, cautious, and not easily swayed by legends, yet she carries a police record from school that complicates others’ trust in her. Anjali challenges the campus myth of Naga and pushes the group toward uncovering uncomfortable truths.

Anjali's boyfriend and a central figure who is initially suspected but later instrumental in revealing the truth. He appears confident and resourceful, and he ultimately discloses the existence of two Nagas involved in the murders. His actions drive the investigation and the final confrontation.

One of the murderers and a radio station RJ who is later revealed to be a Naga. She carries a deep history tied to her sister Saravathy and uses her position to manipulate others. Maya's reveal as part of a dual-Naga pair pivots the story from a campus mystery to a calculated revenge plot.

Anjali's roommate and a college radio operator who becomes a target in the Naga killings. She represents the vulnerability of the group and is a victim of the escalating danger within the campus. Her fate underscores the consequences of meddling with dangerous myths.

A prankster within the group whose death early in the plot is initially dismissed as a prank. His demise deepens the mystery and complicates the line between reality and performance in the campus legend. He is connected to the group’s past actions that resurface as motives.

The College professor who lectures about Naga and appears to be one of the last survivors of the old lab fire. He becomes a focal point of suspicion and is found dead as the mystery unfolds, highlighting the danger hidden within the campus's history.

The junior student who was humiliated in a past school event, whose death and her sisterly connection to Maya lay at the heart of the revenge plot. Her backstory illuminates the motives behind the current killings.

The police inspector who investigates the series of murders, challenging the students’ explanations and confronting them with the truth. He represents the formal investigation and the pressure to separate myth from fact.

The hostel watchman who is revealed to be part of the duo with Maya in the killings. He embodies the theme that danger can come from trusted, everyday figures and adds a final twist to the mystery.