: Beyond basic stats, the book offers "secret" insights into protagonist Kou Kadowaki and the heroines (Rain, Nanoha, Chinatsu, Aki, Makoto, and Sora), including early design sketches and personality notes.
If you are playing the Steam version without the 18+ restoration patch, certain plugin chips (like "Criminal Record") may be removed, preventing access to specific secret scenes tied to those items.
Unlike the in-game glossary, Secret Files often contain . Do not read them until you have finished all routes (including Kou’s final arc) if you want to avoid ruining major twists.
Some unlocks are tied to your performance. For instance, your battle time in certain scenes can influence which endings or related data you unlock.
, which typically unlocks after completing the main story routes. Progressing through specific "waves" of enemies grants various rewards, including these files. Secret File Aki Secret File Makoto Secret File Sora Survival Lv 100: