Jin Uzuki

Jin Uzuki is a playable character in the Xenosaga series. He is Shion's older brother.

History
Far older than Shion, Jin was already an adult during the Miltian Conflict. 14 years before the events of the game, he was ordered by Helmer to take part in an independent investigation to determine the parties behind the Miltian Conflict. He was able to recover some data which he held on a disc. During the conflict he ran into Canaan and chaos, who had come down to Old Miltia to retrieve the U.R.T.V.s. They fight off the enemy together and eventually are confronted by Margulis. Jin does battle with Margulis, whom he personally knows, eventually being able to strike him in the face with an explosion, leaving a scar that remains to this day. Margulis retreats. Jin has Canaan download the data he has found, believing it will be safer with him. He then splits up from them.

Episode I
Jin is limited to two scenes in episode I. While Shion is stations on the Woglinde, she has a video communication with him. They haven't seen each other in person for two years. Jin is insistent that Shion come to Second Miltia for them to visit their parent's memorial. Shion considers doing so an obscure ancient ritual and complains about him reading weird old books. She taunts Jin, telling him she won't take care of him when he's old, senile and alone.

At the end of the game Jin can be seen visiting a tombstone as the Elsa makes its way down to Second Miltia.

Episode II
Jin runs into Shion, Junior and chaos at Moby Dick's Cafe on Second Miltia. Shion is initially trying to avoid him but is soon seen by him. Jin introduces himself to Junior and pretends to be meeting chaos for the first time. He asks Shion why she didn't call him such that they could meet and Shion tries to pretend that she was too busy to meet him. When Allen calls her and reveals that working on KOS-MOS at Vector Second Division will take several days, Shion reluctantly agrees to come home with him. Jin invites Junior and chaos to come along. At their home, it is revealed that Jin has made it into a bookstore. Shion questions him on his earlier desire to become a doctor and he says there is little for him to do there due to modern technology. Jin pushes back against Shion helping Junior and the others, believing it to be too dangerous for her, not realizing the help she has already provided them. He tells her that they should pay respects to their dead parents the next day but she refuses to go to their graves. She almost blames him for their deaths before realizing what she is saying, then leaves. Jin apologizes to Junior and chaos for what they witnessed. He allows them to stay the night. That night he talks with chaos and asks him to take care of Shion for him.

Helmer later visit Jin at his home, asking to enlist his services once again, to find out the truth about the Miltian Conflict using the data in Canaan. When Albedo opens the path to Old Miltia, Helmer plans a covert operation to acquire the, sending Jin on the mission along with Junior, Canaan and the others on the Elsa. Making it to the Labyrinthos mainframe, Jin is able to review the data he left in Canaan 14 years ago. It reveals the involvement of Hyams and the Immigrant Fleet in the Miltian Conflict. Jin speculates that Joachim Mizrahi was not behind things after all and that he tried to isolate Zohar, U-DO and Miltia in order to prevent the worst case scenario. Heading further into Labyrinthos, Margulis appears and Jin does battle with him once again. Margulis is forced to retreat after being defeated.

Jin consoles Shion after KOS-MOS kills Cecily and Cathe,they depart from Old Miltia and it is destroyed. Jin speculates that Febronia loved Shion as much as her sisters and wanted to save her just as much. Speaking to himself afterwards he admits to being envious of Febronia and wonders what he could possibly do for Shion. At the end of the game Jin says goodbye to Shion on the Dämmerung, telling her he is going to investigate Ormus and boards the Elsa.