Iraivan

An ACP famed for aggressive, unorthodox tactics that often rely on lethal force rather than standard arrests. He harbors love for Priya while fearing marriage due to enemies from his career. After the Smile-Killer case and the loss of his colleague Andrew, he resigns and tries to escape the cycle of violence by opening a cafe with Priya. His resolve is relentless, even as it nudges him toward moral ambiguity.

Sister of Andrew and the love interest of Arjun, she provides emotional grounding for him. She joins Arjun in starting a cafe, seeking a peaceful life amid danger. She remains courageous and supportive, balancing personal risk with care for Arjun as they confront the killer’s reign of terror.

A calculating serial killer known as the Smile-Killer, who leaves smiley notes and abducts young girls. His chilling presence drives the plot’s fear and moral ambiguity, and he resists giving away the truth about his co-conspirator. The confrontation with Arjun exposes deeper layers of manipulation and danger.

Arjun's colleague and friend, who shares a tough, no-nonsense approach to crime fighting. He dies heroically while confronting the killer, leaving a lasting impact on Arjun and the quest for justice. His memory motivates the remaining investigation and personal reckoning.

An assistant to Church Father Sebastian who becomes a central figure in the copycat investigation. He is initially suspected and publicly scrutinized, but the truth about manipulation by others emerges. His role tests the public's trust in police and the justice system.

Andrew's widow who becomes entangled in the case when Babu abducts her daughter Sophie. She embodies the personal costs of crime and the pressures on families of victims. She participates in the high-stakes hostage situation and the ensuing media narrative.

The sole survivor of a previous Brahma encounter, whose reactions during torture differ from the killer’s usual patterns. Her presence becomes a crucial thread in unraveling Brahma’s motives and ensuring the pursuit of the true culprit.

The doctor responsible for Brahma's care while imprisoned; his death adds another layer of danger and mystery to the case. His role underscores the fragile line between care, crime, and the consequences of the killer’s reach.

Jasmine's daughter who becomes a target in the hostage crisis. Her safety anchors the tense negotiation sequences and highlights the personal stakes behind the pursuit of justice.