Yuki Tsukumo/Synopsis

History
Years ago, she appeared to the elementary school student, Aoi Todo. Asking him what type of women he was into, she introduced the boy into the world of jujutsu sorcery.

Gojo's Past Arc
On August 2007, Yuki meets with Geto, and talks about how they can stop cursed spirits from being created. Yuki tells him that she has managed to figure out two ways for that to happen. Geto realizes there's a third possibility: the extermination of non-sorcerers. Yuki discusses the idea with him and asks about his conflicting feelings towards normal humans. She tells him that he will soon come to his conclusion. After talking, the two part ways. Yuki leaves reassuring Geto that Tengen has stabilized.

Shibuya Incident Arc
Yuki arrives just in time and manages to save everyone from being crushed by Uraume's Ice Fall technique and asks Pseudo-Geto what type of girls he likes. She asks him if he remembers their conversation about how to create a world where curses no longer exist and proceeds to explain that no matter what method one adopts, humans will continue to evolve. She then says that the next stage of humanity is breaking away from cursed energy. Geto refutes and says that it instead lies in optimizing cursed energy. He mentions that he thought Yuki broke away from that method 12 years ago when Toji Zenin died years ago. Yuki explains to Geto about how his method has a large hole and adds on that Tengen's barrier is necessary for optimizing cursed energy. Geto merely laughs and says that they have different objectives and says that he does not wish for a world where cursed spirits don't exist or a peaceful world. He says that non-sorcerers, sorcerers and cursed spirits are all possibilities of cursed energy in the form of human beings and includes that there must be more potential in humans.

Yuki turns around to Yuji and asks if there's a cursed spirit called Mahito where Yuji tells Yuki that Geto absorbed him. Just after informing her of this, Geto activates Idle Transfiguration and Tengen's barrier starts cracking. Yuki is left shocked as she confronts Geto and asks what he's done. He says that he has remotely casted Idle Transfiguration on two type of non-sorcerers who have been already been marked. He reveals that he adjusted their brains for sorcery and gave them strength as vessels along with the ability to use cursed technique. Geto adds that he has broken the seal on the cursed object and will have them fight each other. Yuki says that a thousand isn't too many and that Geto shouldn't underestimate human rationality. Geto refutes this and says everything has an order and he wouldn't make such an oversight. Yuki gets annoyed by Geto and turns to face Yuji and asks him to beat Geto up where Yuji fails to get up and apologizes. When Momo says that there might still be more of them and suddenly realizes that there's no backup for Mai, Yuki assures her that her comrades are there to protect Aoi and Mai.

Itadori's Extermination Arc
Yuki is alone as she apologizes to her comrades and says that she will deliver the kids who were there to confront Master Tengen.

Culling Game Arc
Yuki is with Maki at Tokyo Jujutsu High hiding as Yuji, Yuta, Megumi and Choso walk into the room they're in where Yuki waves at the group. When Yuta asks Maki if she's allowed to move, who confirms it, Yuki tells him that even with a reversed cursed technique, the burn scars will nevertheless remain. She adds that she expected nothing less of someone who is physically gifted through a heavenly restriction, Yuki then says that the reason behind why Maki is still alive is because of her physical toughness. Before Megumi is able to explain about Tengen's barrier, Choso tells him he will explain. Choso explains that he has a connected with the rest of the Death Painting Wombs where he should be able to provide some guidance. Something Yuki is glad about. When Yuji and Choso push a door open which leads to where the rest of the Death Painting Wombs and Master Tengen residing in is pushed open, Yuki tells the group that there's an elevator that leads down to where Tengen is. When Yuji wonders about the blood stains and what happened there, Yuki tells the group that it happened 11 years ago where everything started disorienting.

She leads the group to where the main shrine is when Yuji comments on how there's nothing around. Yuki says that it's because it's rejecting them before thinking to herself that it might possibly instead just rejecting herself. Yuta says that Tsumiki doesn't have enough time and tells the group to leave just as Master Tengen appears, asking why they're leaving so soon before greeting the group, which leaves Yuki shocked.

Yuki asks Tengen is he's going to say hello to her which Tengen says that it isn't the first time that they've met. She then asks them why they closed off the Tombs of the Star Corridor who says that they were worried Yuki was aligned with Kenjaku. When Yuki asks who Kenjaku is, Tengen reveals that it was the sorcerer who was once Noritoshi Kamo and now is inhabiting Suguru Geto's body. Yuki comments on how it sounds like compassion and salvation, before asking for them to give her a break. When Yuji suddenly asks Tengen why do they look the way they do, Tengen says that they are immortal but aren't immune to aging, which Yuki figures that's the reason why their voice is proliferate and also thinks about how there wasn't another Star Plasma Vessel. When Megumi and Yuta asks Tengen about Kenjaku's objectives and how to unlock the Prison Realm, Tengen says that there is one condition and asks Yuki, Yuta Okkotsu, or Choso to remain as his two guards. Yuki objects to this and says it isn't fair because they haven't told them why and for how long they need to do it.

Yuki listens to Tengen talking about how Kenjaku's objective is to force the evolution of all human beings throughout Japan. While Tengen is explaining about how Kenjaku lacks the cursed energy to do so. When Tengen reveals that the method Kenjaku has chosen is to merge humankind with themselves. Tengen explains that they posses barrier techniques which enable them to maintain their current form and self control even after evolving. They add on that if humankind evolves and only one person rages out, the world will end. Yuki asks them why who says that the impurities of a hundred million people would flood the world, which what happened to Tokyo would happen to the entire world as well. They add that there are no boundaries between individuals so evil would instantly spread. When Maki asks why they refuse to merge, Tengen says that is the problem. Tengen tells the group that now that they've evolved, they are more cursed spirit than human which makes them a target for cursed spirit manipulation, shocking everyone including Yuki herself.

Tengen tells them that considering Kenjaku's ability as a sorcerer, he might be able to seize themselves if they encounter each other. They add that this is the reason why their main body is rejecting everything at the Tombs of the Star Corridor. Yuta wonders if that's the reason why they want guards which they confirm. They tell them that Kenjaku is the second most powerful barrier user behind themselves where Yuki asks them why now of all times. She adds on that he prevented a merging with a Star Plasma Vessel, forced their evolution and also wants to consume and control them through cursed spirit manipulation. She adds on that he was apparently involved with Sukuna and has been a sorcerer for at least 1,000 years. Tengen tells her that themselves, the Star Plasma Vessel and the Six Eyes are all connected by faith.

They reveal that Kenjaku lost twice to a sorcerer with the Six Eyes and the second time he took no chances and killed both the Star Plasma Vessel and the Six Eyes less than a month after they were born. On the day of the merging, both the Six Eyes and the Star Plasma Vessel appeared. Which Kenjaku switched to sealing instead eradicating the Six Eyes and thus began searching for the Prison Realm because two bearers of the Six Eyes cannot appear at the same time. However, the unexpected happened 11 years ago when Toji Zenin intervened. Tengen tells them that he was physically gifted through a heavenly restriction and was an anomaly who had zero cursed energy and destroyed their destiny. Then came a boy with curse manipulation, where all the pieces suddenly came together other than for the Prison Realm which fell into his grasp six years ago.

When Megumi asks why the culling game is happening, Tengen explains the culling game uses the participants and the boundaries binding barriers in a ritual that conveys to the human beings of this country to the other side. And with that, Kenjaku will begin the merging with themselves, however, to preform the ritual, he has undertaken certain binding vows. They add on that one stipulates that he isn't the game master and this game doesn't work in their favor because even if Kenjaku is killed, the culling game will continue until all participants are either dead or the players refuse to participate and die. Yuji notices that Megumi is upset by this but is unsure why. Yuta concludes that they have no other choice but to participate and add a rule that allows Tsumiki and other unwilling participants to safely get out. Megumi adds that they also should free Gojo sensei because he would be able to settle everything on his own.

When it came down to deciding who would be staying behind to guard Master Tengen, Yuki and Choso stepped up for that position. Choso tells Yuji that he will absolutely need either Okkotsu or Yuki's cooperation especially if Kenjaku comes for Tengen. Yuki adds on that she still hasn't finished talking with Tengen and turns to Yuta who agrees and says that he doesn't want to leave the others. Tengen thanks them all and pulled out something that is necessary for freeing Satoru Gojo and reveals that it's the "back" of the Prison Realm. Yuki says that she's never heard of it where Tengen explains that before Kenjaku found the Prison Realm, it was outside of their barrier and believes that it was overseas. Tengen reveals that by sealing the rear gate, they were hiding the existence of the "front" but it was useless. Tengen tells them that Gojo is sealed inside of the rear gate as well and that the authority of opening the gate rests with Kenjaku as he is the bearer point of the "front". They add on that to break it open, they will need the Inverted Spear of Heaven that nullifies cursed techniques and or the Black Rope that disrupts and cancels cursed techniques effects.

Yuji and Megumi are shocked because Gojo either sealed and or destroyed it 11 years ago but Yuta tells them that he along with Miguel searched for it overseas in Africa but to no avail. Yuki asks Tengen if there's a way who confirms there is. Tengen reveals that among the players participating in the culling game, there is a sorcerer from 1,000 years ago who calls herself, an angel and that her cursed technique can extinguish any cursed technique.

When Megumi asks if Tengen is aware of where Hana Kurusu's current location, Yuki listens to Master Tengen explain as they tells them that she is on the east side of Tokyo. Tengen proceeds to explain that there are 10 colonies that connects to a barrier that sends humans from Japan to the other side. Yuki asks if the reason why Hokkaido isn't there because of jujutsu society's barriers which Tengen confirms before adding on that Hokkaido is established as vast sacred land. Tengen says that conveyance to the other side may sound exaggerated but a curse fell on everyone in preparation for the merger. Megumi asks how long the ritual will take where Tengen tells them two months will suffice.

Maki says that it's 9 a.m. on November 9th and Yuta says that the sorcerer players awakened at about midnight on October 31st. Megumi asks Master Tengen that if those who refuse to participate in the Culling Game will die who confirms where Megumi comes to the conclusion that Tsumiki has roughly 10 days and 15 hours until she declares her participation in the Culling Game. Maki says that Shoko was correct and adds on that people such as herself with no cursed technique won't be at risk.

Yuji wonders about the civilians already inside of the barrier which Tengen tells him that they will have one chance to exit much to Yuji's surprise and Yuta commenting on how generous that is of them. Tengen tells them that there isn't a rule about entering nor exiting the barrier and adds on that they believe that it's to stimulate the game. They also add on that in order to confine the players, the premise of them entering of their own free will is important. Megumi asks about the "game master" as Tengen tells them that each player will be given a shikigami called a "Kogane". They add on that a Kogane is less game master than an interface which confuses Yuji and says that they may think of the game master as the Culling Game programmer.

Yuji says that they won't be able to subtract rules that are already present where Megumi tells him that there are ways to counteract the rules. Yuki is confused by the sixth rule where players are allowed to negotiate with the game master to add a rule. Choso asks if the rule is fair which Yuta confirms it is while Maki comments on how it gives the game master a lot of leeway. Tengen tells them that the players are subjected to strict rules and sorcery wise Kenjaku is due to no further bias. Yuji is disappointed that he will be forced to kill more people as Megumi tells him that he has a few ideas. Maki tells them that's all the information they have and each will have a different role to play with Yuki and Choso remaining as Master Tengen's guards.

Maki says that she will head back to the Zenin family's warehouse and search for cursed tools before revealing that soon after Gojo as sealed, both the Kamo and Zenin family went to Tokyo Jujutsu High's cursed warehouse and emptied it of weapons. She adds on that Megumi is the current family head much to Yuji's surprise, because Megumi is the current family head, it's possible to search the Zenin family's warehouse at length. She turns to Master Tengen and asks about Juzo Kumiya's warehouse.

Maki tells them that afterwards, she will go look for Panda and help address the game. She then turns to Yuta and asks what he will do, Yuta says that he will enter a colony immidiately before Tsumiki Fushiguro is needed to enter the game, he also wants to gain more information. He says that he will be avoid nearby colonies so they won't end up killing each other and also just in case something happens to Tsumiki. Yuta adds that the barriers may block phone reception so they will be out of touch for a while. Just then, both Yuta and Yuji realizes that Yuji previously asked for Yuta to kill him if Sukuna ever takes over his body. Megumi assures Yuji that it won't happen and says that if it ever did happen and he dies, Megumi tells Yuji to just have Yuta to kill him. Yuji is angry by this as the point was to not let that happen. Megumi turns to Maki who tells them to go to Kinji Hakari as planned where Yuji is confused as to who that is.

Yuta reveals that Kinji is a suspended third-year as Maki tells them that because they're shorthanded they will need to get as much people involved as possible. Yuji asks if they're tough as Maki says that he's moody while Yuta tells him that when Kinji is worked up, he is stronger than himself which Maki comments on how it's not true. Yuki along with Choso and Master Tengen remain behind and watches as Yuta, Maki, Yuji and Megumi leave. When Yuji suddenly stops and turns around to thank Choso as he tells Yuji not to die. Yuki asks Choso if he's crying who doesn't respond.