I conducted an examination on the enemy lifeform

And I reached the conclusion that they are engulfed in old metals, and that consisted 30% of their body

The other 70% consist of material similar to ocean water

While the exact number varies by individual, the proportion is consistent for Destroyers, Cruisers, Battleships and even the Carriers.

In the end, they came from the sea

And will eventually return to the sea. This much is what I knew