U-DO: Unus Mundus Drive Operation System.

A mysterious wave entity that possesses a connection to the Zohar.

Translation from Xenosaga I.II (DS) database :

[Category: Unknown]

The Unus Mundus Drive Operation System. Said to be a control AI originally created as a U.M.N. navigational device, it was refitted by Joachim Mizrahi as a Zohar command device.

According to Vector records, the history of link experiments with U-DO extends back to the Lost Jerusalem era; apparently, it has been recognized as a wave based existence since far before the development of the U.M.N..

Even today, details on U-DO have not been revealed. It is thought to be a consciousness that exists in a different dimension from our own, and deeply intertwined with the space-time anomaly touched off by the Zohar and its going out of control.