Fleet of Fog

The Fleet of Fog are the main antagonists of Arpeggio of Blue Steel and are named "Fleet of Fog" by humanity.

History
Due to global warming and rising sea levels in the early 21st century, much of Earth's landmass has been lost. In 2039, fleets of powerful sentient warships, armed with advanced technology and weaponry, mysteriously appear and decimate the world's naval forces. These ships, collectively called 'The Fleet of Fog', impose a worldwide naval and aerial blockade, preventing humanity from both traveling the oceans and to other nations. During the blockade, the Fleet of Fog created Mental Models, humanoid avatars containing a ship's Union core, as a means to develop self cultivation and overcome their lack of creative thinking of tactics like humans, which at the same time made the Mental Models have their own unique personality.