Perazhagan

Karthik is a volatile college student whose intense love for Priya clashes with his lookalike Chinna's gentle, service-minded nature. He struggles with his own temper, but his acts of protection and eventual restraint show a capacity for growth. His dual identity drives the central conflict and ultimately leads him to support Shenbagam's happiness.

Shenbagam is a poor, blind girl whose eyes are transplanted with Priya's, revealing a complicated bond between memory, identity, and love. She remains open-hearted toward Chinna despite his looks, eventually accepting him. Her emotional journey centers on gaining vision and choosing companionship over societal judgments.

Priya is Karthik's classmate whose death triggers the central tragedy and the subsequent science of the eyes transplant. Her legacy continues through Shenbagam, who shares her appearance and, for a time, her memories. Her fate drives the reform of the hero and motivates the pursuit of justice.

DCP Nair is Priya's father and a law-enforcement figure who arrests the wrong person in the wake of Priya's murder. His authority shapes the conflict and his choices reflect the film's tension between duty and personal pain. He is a catalyst for the plot's legal and moral twists.

Kuzhandhaisamy is the village friend who acts as a matchmaker, helping Chinna search for a bride and keeping faith with his friend despite insults. He embodies communal warmth and pragmatic optimism, reinforcing the film's themes of social support. He plays a pivotal role in uniting the lovers through his schemes and generosity.