Ar tonelico
The "Second Tower of Ar tonelico", administrated by Frelia, was constructed to be a relay tower for the First, but due to its incomplete status, all of the Reyvateils in Metafalss, excepting for the IPDs, are instead connected to the First Tower in Sol Ciel through the Symphonic Power relay satellite "Sol Marta". On the other hand, the IPD Reyvateils use "Infel Phira" as their Song Server.