Fractalloide

A fractalloide is a type of synthetic being originally from Earth. It is an octahedron with several smaller octahedra orbiting it.

In-game
A silhouette of a fractalloide is visible in Club 38.

There exist several unused sprites of fractalloides in the game files.

As A Symbol
A hexagon with six smaller hexagons surrounding it is known as the "Fractalloide Star". It is the symbol of Clearwater. Versions of this symbol occasionally occur in the game, most notably as part of the title.

Lore
Fractalloides are built by Creators to do their bidding, and are not capable of doing anything else. While some of them can communicate telepathically and have the ability to hold conversations, as seen in The Colours Behind My Eyes, they do not in fact have minds of their own.

Some fractalloides can project different shapes around themselves to obscure their true forms.

Trivia

 * The first boss Demon in the Energy Centre is confirmed to be a nightmare version of a specific fractalloide from Ember's past.