Simhadri

Simhadri, an orphan raised in Ram Bhupal Varma's household in Visakhapatnam, is extraordinarily loyal and compassionate. He treats Varma as a father figure and protects Indu with quiet devotion, even as he is capable of fierce action when necessary. His life shifts when he adopts the vigilante persona Singamalai, blending kindness with violence to shield those he loves. The arc centers on how duty to family can collide with personal happiness and a sense of justice.

Indu is a mentally challenged young woman whom Simhadri visits weekly and protects, revealing his nurturing side. Her condition becomes central to the tragedy when she regains her senses after the train incident, recalling painful memories and later suffering amnesia again. Her presence drives many of Simhadri's choices and the emotional stakes of the story.

Kasturi is Varma's granddaughter who develops feelings for Simhadri and hopes to marry him. Her romance becomes a key catalyst for the family's dynamics and the wedding arrangement. She embodies a bridge between Varma's world and Simhadri's loyalty, even as the wedding plan is derailed by larger conflicts.

Ram Bhupal Varma is a stern but protective patriarch who treats Simhadri as a son and fosters a deep bond with him. His decisions—such as arranging a marriage for Kasturi—shape the plot and underline the expectations of a traditional family. He is shocked by the violence that erupts when loyalties clash, yet remains a central anchor for the family.

Bala Nair is a local goon who controls the Kerala underworld and is responsible for Saraswati's murder. His criminal network catalyzes Simhadri's rampage in Kerala and tests the hero's willingness to take the law into his own hands.

Bhai Saab is an additional mafia boss allied with Bala Nair. His faction clashes with Simhadri, escalating the conflict and highlighting the parallel criminal worlds the hero navigates.

Saraswati is Varma's elder daughter who elopes with Aravind; her fate becomes a turning point when she is killed by Bala Nair, fueling Simhadri's fury and quest for justice.

Aravind is Saraswati's lover, a Keralite whose actions draw Simhadri into Kerala's underworld. He becomes a bomber on a moving train, a threat that ultimately catalyzes the film's climactic moral choices.

ACP Shaukat Ali is the law enforcement figure involved in pursuing Simhadri and restoring order. He represents the official response to the vigilante’s upheaval and the complexities of justice within the system.