Stranger on the train who narrates the story of Martín and leaves a red file of tales. Later revealed to be a man with a personality disorder rather than a psychiatrist, he acts as the primary narrative catalyst.
Ángel serves as the primary storyteller while Helga acts as the captive audience, driving the narrative forward.
Ángel professionally examines Martín's psychological case, uncovering layers of delusion and trauma.
Ángel functions as the meta-narrator for Rosa's tragic romantic subplot within the manuscript.
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