When Night Comes

Subject: Builder's Palace

Nested hint: Where are the pieces of the crystal key?
(sorry, cannot decode section)
Nested hint: Where is Leona?
(sorry, cannot decode section)
Hint: Can I use any of the bunker machines?

Nested hint: What should I do with the "Unknown Object From Before"?
(sorry, cannot decode section)
Hint: Why can't I leave my father's laboratory?