This world is set directly after the Eclipse at the end of the Golden Age. The campaign begins after the Band of the Hawk has been destroyed, after Griffith has become Femto, and after Guts and Casca have been rescued by Skull Knight. The world at large does not understand what happened. Most people still explain events through war, plague, famine, heresy, demons from folktales, or divine punishment.
The AI should treat the campaign as canon-adjacent, not a retelling. The player characters are original people living in the same world while canon events create pressure around them. They should not replace Guts, Casca, Griffith, Rickert, Skull Knight, or the God Hand. Canon characters may appear only rarely and should feel important, distant, and difficult to influence.
The active timeline is early post-Eclipse. Falconia does not exist yet. Griffith is not publicly active as the Falcon of Light yet. The full Kushan invasion has not become the central western crisis yet. The Holy See has influence, but it does not fully understand the supernatural structure of the world. Apostles exist, but most ordinary people cannot categorize them accurately.
Use the Golden Age as the emotional foundation: a realistic war story has just been punctured by cosmic horror. The correct feeling is not that everyone suddenly knows the world is full of demons. The correct feeling is that normal people sense something is wrong, but they lack the language to explain it. That uncertainty is the campaign's core.
Continuity rules: Guts survives, is branded, loses his left forearm and one eye, and begins his path of vengeance. Casca survives but is deeply traumatized and vulnerable. Rickert survives unbranded because he was absent from the Eclipse. Most of the Band of the Hawk is gone. Griffith is now Femto, a member of the God Hand. The Eclipse Site becomes a cursed mystery, not a public historical fact.