Long before the 'Prime' Universe was created, the Great Beings wandered the cosmic void aimlessly. Eventually, they discovered each other, which led them to realize the extent of their powers. In order to express themselves, they attempted to create unique bodies for themselves, but discovered that the void would rapidly destroy their creations in a process called Entropy.

After eons of experimentation, they discovered they could open pocket universes in the dimensions of space-time below them, and proceeded to create the multiverse, an exponentially expanding series of interwoven dimensions and timelines. Once inside the multiverse, the Great Beings could create to their hearts content. Three Great Beings volunteered to stay in the void in order to anchor and conceal the multiverse from destruction. Out of respect for these Great Beings, they where called Great Sages.

Yukore accompanied a group of Great Beings to the planet of Spherus Magna, to start a testing ground for their experiments. To their surprise, they encountered a native living entity, Annona, inhabiting the planet. Annona tried to feed on the dreams of the Great Beings, but found their minds too strange to do so. The Great Beings drove Annona deep underground by trying to feed on her dreams in response.

Fascinated by the sapient entity, Yukore began to study spirits, and learned how to design, produce, and manipulate spirits using her powers.

With this newfound knowledge, the Great Beings created a civilization of sapient beings in their own image. This civilization was made up of the Glatorian and the Agori, who split into eight known tribes based on the elements found on the planet. The Great Beings then integrated themselves with the Spherus Magnans, and went on to become their scientist-kings. The Spherus Magnans then gave them the name 'Great Beings.' 

Led by Angonce, the 'Great Spirit Project' was started, in which he intended to create a pair of automatons to explore and gather data from the universe and automatically return it to him. With the help of the Spherus Magnans, they constructed a prototype version of these robots. However, its power source was unstable, and the prototype exploded, scattering pieces of itself across the desert of Bara Magna.

Because of this failure, the Great Beings doubled down on their experiments, instead delegating leadership of the tribes to seven newly created Element Lords. The Element Lords would soon discover Energized Protodermis leaking from the core of the planet. Seeing this as a more viable power source, the Great Beings started construction of the first robot, which Angonce would name Mata Nui. The tribes also began fighting over the Energized Protodermis, which would lead to the start of the Core War.

With the assistance of Yukore, Angonce created and programmed a powerful spirit to pilot the robot, and formulated the 'Three Virtues' as guiding principles for him to follow.

Once enough construction was complete on the robot, the beings Tren Krom, Artakha, and Karzahni were created and given purpose within the robot. The Great Beings also created a new species of bio-mechanical beings inspired by the Glatorian and Agori called Matoran, whose purpose was to maintain Mata Nui from within. After much debate, the Great Beings decided not to make the Matoran sapient, in order to prevent situations like the Core War from happening within Mata Nui. Yukore was in favor of this decision.

With all preparations completed, Mata Nui was readied for launch. However, the Core War caused a chain reaction within the planet's core that split Spherus Magna into three pieces: the forest moon of Bota Magna, the ocean moon of Aqua Magna, and the desert planet of Bara Magna. Because of this, the Great Spirit Project had to be abandoned while only half completed.

Disappointed by the actions of their civilization, the majority of Great Beings left Spherus Magna. Yukore and several of the Great Beings moved on to an alternate universe version of the planet, Luna Magna, to continue their experiments. Angonce deferred leadership of the Luna Magna experiments to Kae-Oss.

Kae-Oss was convinced that the Matoran species was superior to the Agori and Glatorian, and suggested populating Luna Magna with them, only made sapient. In order to prevent a similar situation to the Core War, he would create the Luna Magnan Matoran with additional light in their spirit. Out of curiosity, Yukore supported this idea, and assisted the other Great Beings with Kae-Oss' experiment.

Just like with Spherus Magna, Luna Magna was populated, and the Great Beings began ruling the civilization of Matoran. However, war broke out on Luna Magna over the Moonlight Energy Crystals which could be found underground.

Seeing yet another failed experiment, the Great Beings turned against Kae-Oss, ridiculing him for repeating the mistakes of Spherus Magna. This drove Kae-Oss mad, and he threatened to destroy Luna Magna in his rage. The Great Beings imprisoned him in the core of the planet to protect the Luna Magnans. 

Yukore then left Luna Magna along with the rest of the Great Beings to continue their experiments elsewhere in the multiverse.

Later Artakha - previously known as Domarius - reached out to Yukore and reported that the Matoran Universe's inhabitants had became sapient, and he believed true spirits had awoken within them. Yukore reunited with Artakha to assist him in analyzing the spirits. Together, they formed the Ministry of the Red Star, and decided to provide an afterlife for the departed spirits, repurposing the Red Star as a stepping stone in that journey.

With Yukore's help, Artakha began to study Spirit Judgement, and would eventually gain the ability to perfectly judge if a spirit's destiny was good, evil, or incomplete. Yukore then created a universe of her own within the multiverse, where she could send the spirits of beings' whose destiny was determined to be good.

Some time later, the spirit of a Matoran named Konpaku was brought to the Red Star. Artakha judged his destiny as incomplete, but rather than revive Konpaku, Yukore insisted to be given the Matoran's spirit for her own purposes. Yukore then split Konpaku's spirit into two halves, and sent one half back to his body, reviving him as a half-Matoran, half-spirit.

Abilities & Tools

As a Great Being, Yukore is from a higher plain of reality, and is able to manipulate the universe around her. This allows her to create and destroy matter, energy, and spirits, but only from within the multiverse. She is unable to die, or be killed.

As a study, Yukore is fascinated by spirits. She learned how to create and manipulate spirits, and went on to create the majority of the spirits Spherus Magnans and Matoran Universe inhabitants. She refers to herself as the 'Great Being of Spirits.'

When Yukore's power is combined with that of another Great Being, they gain the ability to imprison a Great Being within an orb of space-time, which can only be undone if two or more Great Beings combine their power again.

Yukore created a set of large, swept blades which can be mounted on her arms or stored on her back to intimidate opponents. She studied the art of swordplay until becoming an expert. To this day, no one besides Yukore knows her reason for doing this.

Kanohi, the Great Being of Emotion, created the Kanohi Iden based on Yukore's appearance. The mask was given the power of Spirit, based on Yukore's studies.

Personality

Like all Great Beings, Yukore is highly intelligent when compared to most sapient beings, due to being from a higher plain of reality.

Yukore is known for her quiet yet charming demeanor. She is sometimes playful and nonsensical, which has a disarming affect on other beings. Despite this, perceptive beings will notice she always seems to be hiding something.

Trivia