Arpeggio Of Blue Steel - Admiralty Code

The central plot of the series—specifically involving the "Great Missing" and the pursuit of I-401—revolves around the Admiralty Code. The humans and the Fog alike are trying to understand why the Fog exist and who gave the initial order.

The Admiralty Code is the central, enigmatic artificial intelligence entity that serves as the origin, creator, and absolute commanding authority over the Fleet of Fog—a massive, sentient naval force that has blockaded Earth's oceans for over 17 years. Despite its pivotal role, the Code never physically appears in a singular form. Instead, it manifests through "Adjuncts" (avatars), direct mental commands to Fog vessels, and its own will encoded into the very structure of Fog nanomaterials. Its motives are paradoxical: it simultaneously commands the Fleet to isolate humanity while allowing the conditions for a potential evolutionary leap for both species. The Admiralty Code is not merely a leader but a fundamental law of the Fog's existence. arpeggio of blue steel admiralty code