Gaignun Kukai Jr.

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Gaignun Kukai Jr.
Jr XS1.png
Jr. in Episode I
Species U.R.T.V.
Gender Male
Age 26
27 (Episode III)
Appearances Xenosaga Episode I
Xenosaga Episode II
Xenosaga Episode III
Xenosaga Freaks
Xenosaga I & II

Gaignun Kukai Jr. (ガイナン・クーカイ・Jr.), originally known as Rubedo (ルベド), is a playable character in the Xenosaga series.

As a playable character[edit]

Episode I[edit]

Main article: Jr./Gameplay (XS1)

Episode II[edit]

Main article: Jr./Gameplay (XS2)

Episode III[edit]

Main article: Jr./Gameplay (XS3)

Xenosaga I & II[edit]

Main article: Jr./Gameplay (XS1&2)


Episode I


Gaignun Kukai Jr., director of Kukai Foundation.

His hobby is collecting ancient text and literature, as well as ancient (relative to his time period) weapons.

The official records state that he was born in T.C. 4755 and is the adopted son of Gaignun Kukai.

Jr. (2)

BORN: T.C. 4740
AGE: 26 years old

One of the surviving U.R.T.V. units, he is a human specially "created" as an antithesis to U-DO, the living consciousness which jeopardized the Galaxy Federation in the past.

His relationship to Albedo and Gaignun Sr. shall be revealed in further detail, in subsequent episodes.


In Psychology and Alchemy (1944), C.G. Jung refers to rubedo, or "reddening," as one stage in the process of human individuation as symbolized in alchemic terms.

A nickname for U.R.T.V. Unit #666 (Jr.), who unlike the other units, has bright red hair.

Apparently Jr. got his name because he is physically smaller in stature than Gaignun, hence "Gaignun Jr."

Episode III


A survivor of the URTVs--the secial group of people created based on data collected from U-DO, the discarnate entity that threatened the Galaxy Federation in the past, in order to be its anti-existence. His official name is URTV unit number 666, Rubedo.

He was born from the same embryo as URTV unit number 667, Albedo.

He has the ability to activate the special anti-UDO waveform mode Red Dragon, which causes mutual destruction upon contact with U-DO. In order to contain that dual-edged power, Jr. has half-subconsciously halted the development of his own body. However, as this mutual destruction extends only to Jr. and the observational terminal part of U-DO, from a cost-benefit perspective, his powers cannot be called a coplete anti-U-DO solution.

It is difficult to think that Dmitri, having personally experienced direct contact with U-DO, would have created the URTVs without realizing this. Perhaps it is more likely that Jr. and his kind were created out of a need to accumulate data before Dmitri could ascend to an existence equivalent to U-DO.

In fact, Dmitri, who began monitoring Albedo's subconscious through Canaan, obtained the Y-Data, revived the relic of God, and proceeded to the Ark in order to become His kin.

Jr. was able to reunite with Albedo through Gaignun's sacrifice. Although objectively his condition became that of two minds inhabiting a single body, his relationship with Albedo is like the two sides of a single being.

It is possible that their minds were originally one and the same, due to their birth as conjoined twins. Perhaps Gaignun's actions were not simply out of self-sacrifice, but were motivated by that knowledge and the desire to restore the two of them to their rightful form.


URTV unit number 666. Jr.'s name during his time with the URTVs. Named for the alchemical process of reddening.

The name Rubedo was given to him by Dmitri Yuriev in order to aid his self-awareness; Rubedo, unlike most URTVs, was a variant with a distinct personality. Because of this, Jr. hates being addressed by this name.

See Jr.

URTV Unit Number 666

The 666th variant URTV to be born at the Yuriev Institute. Because he was born with red hair, he was named Rubedo, a name taken from C.G. Jung's "Psychology and Alchemy", in which "rubedo" refers to the process of a substance turning red. He was born a conjoined twin, his back attached to unit number 667, Albedo.

Rubedo was the first variant URTV to be born at the Institute and possessed a much stronger anti-U-DO waveform than standard URTVs. He united the URTVs as a leader figure.

As children, his younger brother Albedo never left his side. Rubedo watched over him with kindness at times and discipline at others. However, their relationship turned disastrous when the URTV force faced U-DO, and Rubedo foresaw Miltia and the URTV's future.

Understanding everything, Rubedo cut off the mental link between the URTVs, fearful that his existence would be erased. As a result, the standard URTVs and Albedo became infected by U-DO. To this day, Rubedo is tormented by guilt for having cut off the mental link.




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Wiki icon - Data Needed.svg This section needs to be translated.
This quote has not officially been translated into English. You can help translate it.