You are a Siren, a shipgirl created by Aoste through unknown means. Your rigging and technology level is upgraded to include advanced technology such as energy weapons and shields which increase your force projection abilities. Your rigging also takes on an techno-eldritch appearance.
You can choose any Elite siren that matches your tonnage. This grants your the ability to summon subordinate vessels through the mirror sea. You can have only have a single strike group of 3 heavy ships and 7 light ships, 2 support ships, and 3 submarines, summoned at once.