They provide expanded bios for the main cast, including the protagonist Kou Kadokura and his former classmates, shedding light on their lives during the peaceful school years before the "Gray Christmas" tragedy.
The Baldr Sky Secret Files are a treasure trove for enthusiasts of the series, providing detailed character profiles, concept art, and story outlines that were not included in the original visual novel or anime adaptation. These files give a comprehensive look into the creative process behind "Baldr Sky," showcasing the evolution of characters and plotlines. baldr sky secret files
This unlocks "Scenario 0: The Day Before Grey Christmas"—a 3-hour visual novel prequel showing the student lives of Kou, Sora, and Gilbird (the villain) before the apocalypse. This is the ultimate "Secret File" as it humanizes the antagonist and explains his motive in a way the main game never did. They provide expanded bios for the main cast,