This structural change serves two purposes. First, it allows the audience a guided tour of the train's distinct compartments (The Drawers, The Nightcar, The Chains) without the urgency of a full-scale war. Second, it redefines the protagonist. Layton is not merely a warrior; he is a detective and a historian of the train. The investigation serves as a narrative device to expose the rot at the heart of the system. The discovery that the victim was involved in the "Drawers" hints at a conspiracy that transcends simple class warfare, suggesting the leadership is hiding secrets about the train's sustainability.
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