Mental Cube

History
Mental Cubes are made from retiring current ships or finding them from Sirens. When the Butterfly Incident hit, the sirens went into hiding, and such, cubes ran dry with none of the 4 large nations at the time able to remain large scale, and thus were replaced mostly by the under firepowered Tactial Dolls to fight an additionally Underpowered Threat.

Purpose
Mental Cubes are small, 5 x 5 Cubes found at the heart of all Sirens and Ship Girls.

Cyan - Cyan Cubes are the cubes found in normal Ship Girls.

Gray - Gray Cubes are the cubes found in standard Sirens.

Black - Black Cubes are cubes that are used for sirens that are products and by products of Project: Orochi.

Abittilys
Mental Cubes give ship girls the sustenance to exist. The shape the Cube takes will vary based on what the creator forms them into.

PR Research
PR Research is an operation to gather information to create new, Extra Generation ships. It has been proven that if enough people believe in a ship, along with the proper research was made, a mental cube can become a ship of any type or weaponry. These factors are influenced by the blueprints required to achieve retriofit, and the combat experience they receive. Additionally, PR research ships are able to switch between a cube and ship at will, unlike other ships who need to be retired or be "sunk" to become a cube again.

Cube Breaking
It has been shown that a Mental Cube can crack and shatter. This has been dubbed "Cube Breaking", most often happening as a side effect of heavy battle damage. Mental Tolls of a Cube Break include Insanity, Paranoia, Self Isolation, and Obsessiveness.