Y-Data

The Y-Data is an extensive log of Joachim Mizrahi's research data and the target of several factions in the Xenosaga universe. It is hidden within the neural network of MOMO Mizrahi. 
==Contents of the Y-Data==
* An image of a naked Shion Uzuki crossing her arms over her chest
* Information on KOS-MOS
* Information on the , Proto Merkabah, Merkabah and the Song of Nephilim
* Information on the Gnosis phenomenon
* The location of 
* The access codes to the U.M.N. transfer column leading to Miltian space, which have been lost since the Miltian Conflict
* Records claiming that the key to ascend to the Upper Domain is the unification of the Relics of God
* Information on Abel and his existence:
** The release of Lemegeton will awaken Abel
** "When Abel awakes, his cradle, the Ark, shall appear. It shall seek the eternal circle."
** Abel is an essential component in controlling Ω
* Matthew 28:2 from the Bible:
** "And, behold, there was a great earthquake: for the angel of the Lord descended from heaven, and came and rolled back the stone from the door, and sat upon it."
==Story==
===History===
Some time before T.C. 4753, Joachim Mizrahi created the Y-Data from his analysis of the Fragments of Lemegeton that were scattered across the U.M.N. since the era of Lost Jerusalem. Lemegeton itself is a record of the words of God as inscribed by a certain person in ancient times. The information Mizrahi gleaned from these words amounted to a majority of what is contained within the Y-Data, and much of Mizrahi's work was based on them. 
During the Miltian Conflict, several of Mizrahi's colleagues—namely Margulis, Sellers, and Kevin Winnicot—attempted to gain access to the Y-Data for their own aims. However, Mizrahi wouldn't budge. Following his death at the end of the conflict, the only remaining copy of the Y-Data was held by MOMO, the 100-Series prototype he created.
===Episode I===
In T.C. 4767, MOMO Mizrahi is taken captive by the U-TIC Organization in the hopes of extracting the Y-Data from her. However, before Albedo Piazzolla can have the chance to examine her, MOMO is rescued by a cyborg hired by the S.O.C.E. named Ziggy.
Later, in the ensuing chaos of a Gnosis attack on the Kukai Foundation, MOMO is once again kidnapped by Albedo and taken to the Song of Nephilim. In the Song of Nephilim, Albedo is seen attempting to access the Y-Data from MOMO's subconscious through physical means. However, he is interrupted partway through when Gaignun Kukai Jr. activates the Red Dragon. Albedo does manage catch a glimpse of the protections placed on the Y-Data, but does not progress enough to unlock the way to Old Miltia.
===Episode II===
When the main party arrives on Second Miltia, MOMO is brought to the U.M.N. Control Center to get the Y-Data analyzed. However, during the analysis, they discover that Albedo had planted a trap within MOMO's subconscious during their previous encounter. In order to prevent Albedo from accessing the Y-Data, MOMO fragments her neural network, but in doing so causes her to be unresponsive. The party then enters her Subconscious Domain in order to restore her neural network and retrieve the Y-Data, but it ends up being a lure to force MOMO's hand in stopping an altercation between Jr. and Albedo. MOMO falls for the lure, and Albedo retrieves the full Y-Data, opening the way to Old Miltia.
===Episode III===
Dmitri Yuriev, newly awakened within Gaignun Kukai's body, obtains the Y-Data by observing Albedo's subconscious through Gaignun. With the Galaxy Federation in his control, Yuriev begins the construction of the Merkabah using the information in the Y-Data and sets a plan in motion to unite the Relics of God and ascend to the Upper Domain.
==Lore==
* It is a common belief in the wider Xenosaga community that the data disk that Jin Uzuki gave to Canaan during the Miltian Conflict was a fragment of the Y-Data. However, this misconception is directly contradicted by the Episode III database entry for Federal Report 08. Extra dialogue from Jin in Canaan's Xenosaga I & II side story (which covers the events of Episode II's prologue) outright denies that the data disk he holds is the Y-Data.
==Database==
==Gallery==
Proto Merkabah Y-Data.png|Proto Merkabah in the Y-Data.
KOS-MOS Y-Data.png|KOS-MOS in the Y-Data.
Naked Shion Y-Data.png|A naked Shion in the Y-Data.
Category:Lore (XS)