Dmitri Yuriev

Dmitri Yuriev is a major antagonist in the Xenosaga series. He is the creator of the U.R.T.V.s.

History
Yuriev founds the Yuriev Institute. He is the creator of the U.R.T.V.s and acted as their male genetic donor. Years before the events of the game, he helped provide treatment to Sakura Mizrahi, using the U.R.T.V. variants to interact with her within her subconscious domain. He was eventually shot and killed by Nigredo.

Pied Piper
During the events of Xenosaga Pied Piper, Dmitri Yuriev holds influence over the Federation in its dealings with the Immigrant Fleet. He had met Erich Weber, also known as Voyager, who similar to him had contact with U-DO and foresaw the potential end of the world. Yuriev would provide narcotics to Voyager, who saw him as his sole companion and someone who understood his feelings. This enables Yuriev to exert influence over Voyager. This included through Yuriev's front organization, the Descendants of Nestorious.

Yuriev's role in things is eventually uncovered by Jan and his colleagues. As such Yuriev has his subordinates interfere with the investigation, having it called off and arresting Jan and his colleagues. Yuriev is seen with his assistant, Zora, also concerned about the activities of the Immigrant Fleet. Yuriev desires the, which the Immigrant Fleet possesses, for himself. When the Zohar is activated by the Immigrant Fleet, Yuriev can feel it. He becomes distressed upon realizing that Voyager is calling out for U-DO and withdraws support for him.

At the end of the game, Yuriev influences the Federation to impose a military sanction on the Immigrant Fleet, further straining the relationship between the entities. He leaves the political stage to found an institution researching U-DO.

Episode II
In the present day it is revealed that Yuriev has been able to revive himself by awakening his consciousness within Gaignun. When doing so his hair changes back to his original color. The first time this occurs he reaches out to his subordinates about the current situation. He attacks and takes over the Federation Parliament, revealing himself to Pellegri after killing an Ormus hidden agent. He later reveals himself to Junior by contacting him on the Durandal. Junior is shocked and angry to realize that he has returned. Yuriev tells Junior to eliminate Albedo as he has attempted to re-contact U-DO. Shortly afterwards, Gaignun is able to retake control of his body.

Future Redeemed
Dimitri Yuriev (spelled with in axtra 'i', matching his original Japanese spelling) was mentioned at the end of Xenoblade Chronicles 3: Future Redeemed in the radio broadcast on the Ark. Here, he is a councilperson of the Minos Authority issuing a statement on the issue of the "Saviorite" Human Rights Protection bill. It is unknown whether this is supposed to be canon or just an Easter Egg.