Material-S is a Material, part of the system Unbreakable Dark materialized as a clone of Nanoha Takamachi during the Dark Fragment Incident.<br /> <br /> Her name is first introduced in The Battle of Aces in English Material-S and in Japanese "Exterminator of Starlight" without specific ruby-kanas. The "S" in her name is believed to stand for "Stars" or "Starlight", which are both associated with Nanoha.<br /> <br /> In The Gears of Destiny, it is revealed her rubied name is Stern the Destructor, which may be shortened as Stern. Stern is German for "Star." <br /> <br /> Her device is Luciferion.<br /> <br /> (Source: Nanoha Wikia)<br /><br />
