Character Relationship Map: Petromax

Characters

• Meera (played by Tamannaah Bhatia) — protagonist

  A ghost residing in the ancestral home. Originally the wife of Vijay Karuppaati, she survives the fire set by Saravanan but suffers severe facial injuries. She witnesses Saravanan murdering her adopte...

• Thangam (played by Kaali Venkat) — supporting

  One of the friends who stays in the haunted house. He is a heavy drinker who only begins drinking after 9 PM and once lost crucial funds for his son's surgery due to an intoxicated cricket bet.

• Senthil (played by Munishkanth) — supporting

  A central protagonist who arranges for his friends to stay in the haunted house to prove it is safe. He cares for his amnesiac mother and remains remarkably calm during ghost encounters, ultimately he...

• Nandha (played by Sathyan Sivakumar) — supporting

  One of the friends staying in the house. He suffers from deafness and night blindness, relying on a flute to calm himself when scared. He previously lost his job after failing to prevent an ATM robber...

• Saravanan (played by Prem) — supporting

  The primary antagonist and son of Vijay Karuppaati. He returns to India after a business loss and decides to sell his ancestral home. To prevent the sale, he murders his adopted family and stepmother...

• Guru (played by Mime Gopi) — supporting

  An accomplice to Vetri who helps fabricate the ghost story to manipulate Saravanan into selling the ancestral home cheaply for a commercial project. He later murders Vetri when the latter discovers Sa...

• Meera's Father (played by K. S. G. Venkatesh) — supporting
• Kaali (played by TSK) — supporting

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Meera's Father → Meera (father)
• Senthil → Saravanan (Professional Commission Arrangement) — Their financial arrangement drives Senthil's dangerous investigation.

  Senthil agrees to send his friends into the house, and Saravanan will pay him a percentage of the sale price if the house is proven safe.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Kaali → Thangam (Social Housemate) — They share the group's dangerous overnight occupation.

  Both Kaali and Thangam are among the financially desperate friends who stay together in the haunted house.

• Guru → Meera (Conflict Supernatural Enemy) — Guru's property scheme places him directly against Meera's spirit and her family.

  Guru helps promote the fabricated ghost story to obtain the house, and the ghosts later kill Guru and his goons in revenge.

• Meera → Nandha (Conflict Haunting Adversaries) — Nandha becomes part of the visitors' unusual resistance to the haunting.

  Nandha stays in the house during the ghosts' attempts to scare the group and uses his flute when frightened.

• Meera → Kaali (Conflict Haunting Adversaries) — Kaali's theatrical behavior undermines Meera's attempts to drive the visitors away.

  Meera and the other ghosts attempt to frighten Kaali's group, but Kaali responds by acting out movie scenes and remains unfazed.

• Meera → Thangam (Conflict Haunting Adversaries) — Their encounter shifts from supernatural intimidation to mutual resistance.

  The ghosts, including Meera, try to scare away the people staying in the ancestral home, while the group remains calm and intimidates the spirits.

• Saravanan → Guru (Alliance Conspirator) — Guru supports the plan surrounding the house sale and later becomes an enemy of the ghosts.

  Guru conspires with Vetri to fabricate the ghost story and pressure Saravanan into selling the ancestral house cheaply.

• Saravanan → Meera (Conflict Murderer And Victim) — Saravanan's attempt to silence Meera creates the central supernatural conflict.

  The flashback states that Saravanan poisoned his family, burned them, and smashed Meera's face with a stone after she survived.

• Senthil → Thangam (Alliance Teammate) — They cooperate in the attempt to prove that the house can be occupied.

  Thangam is one of the friends who stays in the haunted house after Senthil arranges the overnight test.

• Senthil → Nandha (Alliance Teammate) — Nandha contributes to the group's resistance despite his deafness and night blindness.

  Nandha is one of the friends who stays in the house with Senthil during the ghost encounters.

• Senthil → Kaali (Alliance Teammate) — Kaali joins Senthil's scheme because both need money.

  Senthil meets Kaali at the hospital and recruits him for the group staying in the ancestral house.

Story Analysis

A haunted family home becomes the site of a murder revelation, supernatural revenge, and compassionate renewal.

Plot Progression

1. A House Full of Secrets — Saravanan returns to India and encounters the aftermath of his family's death. Meanwhile, Meera and the other ghosts remain in the ancestral home and frighten away potential tenants.
2. The Dangerous House Test — A scheme develops around selling the ancestral home cheaply. Senthil accepts the challenge of sending friends into the house because they all urgently need money.
3. Visitors Who Will Not Run — The friends endure repeated supernatural attacks but remain unusually calm because of their personal habits. Their resistance gradually changes the balance between the ghosts and the living.
4. The Crime Beneath the Haunting — The property scheme intensifies while the real ghosts defeat fabricated spirits. A flashback finally reveals that Saravanan murdered his family and attacked Meera.
5. Revenge and Renewal — The ghosts learn the truth and kill Saravanan and Guru. The surviving friends find cash and transform the house into a retirement home.