* The Candidate: This is the protagonist of the film, although we never learn their name. They are one of eight candidates taking a mysterious exam in a stark white room. The audience experiences the exam through their eyes, so the character becomes a stand-in for the viewer.
* The Examiner: This character is the enigmatic figure who oversees the exam. They wear a mask and remain silent throughout the film, creating an air of mystery and tension.
* The Other Candidates: While we don't get to know them well, the seven other candidates play significant roles in the film. They represent different personality types and reactions to the pressure and stress of the exam. Each of them has their own unique story, anxieties, and motivations.
It's worth noting that the film focuses more on the collective experience of the candidates and the atmosphere of the exam itself, rather than developing deep individual backstories for each character. The mystery surrounding the exam and the potential consequences of failure are central to the narrative, making the film a psychological thriller that explores the dark side of human nature under pressure.