A Useful Ghost

The self-described academic ladyboy narrator is overwhelmed by dust from the city’s renewal and cleans his apartment with a vacuum. He becomes entangled with Krong’s ghost and leads the audience through the haunted factory tale. His curiosity and affection for Krong drive personal revelations about memory, desire, and the afterlife.

The vengeful spirit of a factory employee who died of congenital heart disease. He habitually possesses machinery, blaming the factory for his death. His presence persists because someone close to him remembers his life, anchoring him to the physical world through memory.

Heiress to the family electronics factory, troubled by Tok’s haunting and the ensuing regulatory troubles. She loses her license to operate the factory after Tok’s disturbances and faces pressure from conservative in-laws. Her decisions—especially confronting Nat—shape the factory’s fate and her family’s future.

A ghost bound to a vacuum who seeks to start a family with March by using Nat’s frozen eggs. She befriends Dr. Paul and later becomes a catalyst for mass-exorcism efforts. Nat’s humanity becomes more pronounced as she negotiates love, memory, and power, gradually revealing a more complex motive than simple haunting.

Suman’s son and Nat’s lover who is grieving the loss of his wife and their unborn child to a respiratory illness. He is drawn to Nat’s human form and becomes entangled in hospital and dreamworld crossovers. His protective instincts clash with his longing for a family and his struggle with memory and identity.

The Prime Minister of Thailand who intervenes in Nat’s case, promoting a controversial project to use electroshock therapy to explore dreams and memories. He seeks bureaucratic clearance to mass-exorcise politically inconvenient ghosts, leveraging science for political ends. His plans are ultimately challenged by Nat and the consequences unfold around him.

Tok’s boyfriend, whose dreams are a target of his spirits’ influence. Pin’s memories and dreams become a focal point in understanding Tok’s haunting. He represents a personal bond amid the broader social and political upheaval surrounding the factory and its workers.

The repairman who is revealed to be a ghost haunting his own vacuum. He was murdered by having his feet encased in concrete and thrown into a lake. His presence lingers through his daughter's memories, which Nat’s interventions threaten to erase, ultimately driving him to seek vengeance and closure with the Ladyboy.