When Nobara was in first grade, Saori, a girl from Tokyo moved to her village. Nobara idolized Saori, but the villagers ostracized her. Saori became good friends with Nobara, making treats for her that Nobara has never tried before. The villager's hate drove Saori's family out, which disgusted Nobara and was the primary reason for her leaving to Tokyo, hoping to see her friend.
Nobara arrives at Tokyo from Morioka by train. Nobara then heads to Harajuku, where she meet up with Satoru Gojo, Megumi Fushiguro and Yuji Itadori. Gojo tells them that they will be heading to Roppongi, which Nobara and Yuji are happy about but are soon disappointed when they find out that it's for a mission. Gojo tells Nobara and Yuji that they will handle this mission alone since it will be a test to see what they're capable of. Nobara and Yuji then head into the building. Nobara suggests that they split up, which Yuji disagrees with but Nobara doesn't care and heads upward in the building while Yuji takes care of the lower floors.
While searching the upper floors, Nobara finds a cursed spirit that has disguised itself as a mannequin and uses her cursed technique to exorcise it. Suddenly, Nobara hears a noise and notices a child in the corner. Nobara tries to have the child come with her but he wouldn't move. Nobara plans on getting Yuji to help her, but a cursed spirit suddenly appears and takes the child hostage.
Nobara thinks about what to do and decides to drop her hammer and nail in order to get the spirit to let the child go. Suddenly, Yuji busts through the wall and saves the child by cutting off the spirit's arm. As the spirit tries to escape, Nobara uses her Resonance on the spirit's severed arm to exorcise it.
After exorcising the spirit, Nobara and Yuji get into an argument about how that was dangerous and that Yuji had broken through a concrete wall. Yuji then asks why Nobara came to the magic college, which Nobara replied that she didn't like living in the country and that this was the only way to not have to worry about money. Nobara then thanks Yuji for helping her out. After the mission is accomplished and the child is taken home, Gojo says that they will go eat now to which Nobara suggests sushi.
Later on, Nobara heads to a detention center along with Yuji and Megumi. Jujutsu sorcerer, Kiyotaka Ijichi tells the three of them that they'll be heading into the detention center to exorcise a high-grade spirit. When a parent of one of the students in the detention center arrive and asks about their child, Yuji says that they will go rescue them which Nobara agrees with. The three head into the screen containing the detention center, and notice that the magical force has expanded the dormitory.
They notices that the entrance has disappeared, but Nobara and Yuji are glad that Megumi's Divine Dog shikigami is capable of locating the exit. As the three head deeper into the territory, they comes across multiple corpses and notice that one of them is the one that they are looking for. As Yuji and Megumi start to argue with each other, Nobara tries to stop it but ends up being teleported away.
Nobara then comes across what seems to be multiple cursed spirits and prepares to take them on. Nobara takes on the spirit but can't exorcise it as she didn't bring enough nails, and is about to be eaten. Suddenly, Megumi comes to Nobara's aid, and places her inside one of his frog shikigami, to which she reacts with disgust. Megumi takes Nobara out of the territory and gives her to Kiyotaka, who takes her to the hospital.
Later, Nobara is with Megumi at a shrine and talk about how Yuji's death was a first for them in someway. When Maki, Panda, and Toge shows up, Nobara asks who they are which Megumi tells her that they are the second-year students. Panda then tells the two that they will be participating in the Kyoto Goodwill Event, which Nobara wonders what that is.
Maki Zenin, Panda, Toge Inumaki, and Megumi explain what the Kyoto Goodwill Event is and why they need the first-year students to participate. Nobara says that she will join, but will need to train first. Later, Nobara is training with Panda, but complains about how she has to go buy a jersey since the school uniform is bothersome. Nobara then heads out shopping, and wonders where Ura-Harajuku is at.
A few days later, Nobara and Megumi are confronted by Kyoto students, Aoi Todo and Mai Zenin. As Aoi moves in to attack Megumi, Nobara tries to go and help him but Mai restrains her. As Mai says that Megumi is nothing to Aoi, Nobara insults Mai by comparing her to Maki which angers Mai and shoots Nobara multiple times.
Suddenly Maki shows up and distracts Mai long enough for Nobara to put Mai into a restrain. Aoi shows up and says that they are leaving, hence Nobara releases Mai much to her annoyance. After Aoi and Mai leave, Nobara has a talk with Maki after which Nobara comes to understand and respect her senior even more.
On the day of the event, Nobara prepares to head out to the event but wonders why the others are not packed. Panda explains to Nobara that the event is being held at the Tokyo college and not at Kyoto, which Nobara gets angry about this. After the Kyoto students and faculty shows up, Gojo arrives and reveals that Yuji is still alive, a fact that shocks Nobara. Nobara is angry at Yuji for keeping his revival a secret, forcing him to apologize. After the faculty explain how the event works, Nobara attends a pre-event meeting with the other Tokyo students and discuss what they will do during the event.
Once the event starts, Nobara travels with the other Tokyo students until they run into Aoi. Nobara splits from the group with Panda and Toge. After splitting, Nobara talks with the two about how the Kyoto students might be trying to kill Yuji. Nobara and Panda decide to head back and handle the Kyoto students, while Toge head out to find the cursed spirit. Nobara and Panda then run into Momo Nishimiya and decide to play with her. Nobara starts to taunt Momo into losing her temper, when Mechamaru suddenly fires a blast at Panda. As Mechamaru turns his attention to Nobara, Momo stops him and says that she will face her. Suddenly Panda gets up and attack Mechamaru, and leaving Nobara to deal with Momo.
Nobara then fights against Momo, with Momo keeping her distance from Nobara. Momo uses a gust of wind to distract Nobara and uses her broom to land a blow on Nobara's face. As Nobara gets angry at Momo, Momo explains her view on how a women sorcerer should be. Nobara finds Momo annoying and continues her attack by firing nails at Momo. Momo manages to dodge all of Nobara nail and starts to explain what Mai had to go through with her family. Nobara uses her Straw Doll Technique to knock over the trees around Momo, who tries to evade all of the falling trees. Nobara manage to get one of Momo's broom straws and uses it to disrupt Momo control over her broom. Nobara manages to get close to Momo and starts to hit her multiple time with a squeaky hammer. Before Nobara can knock Momo unconscious, Mai shoots Nobara unconscious with a rubber bullet to her temple.
When intruders invade the site, Nobara wakes up and notices that a screen is starting to cover the site. Later, Nobara along with Mai come across Utahime, who is being attacked by an intruder. As Nobara prepares to fight Haruta Shigemo, but the intruder runs away when Gojo suddenly breaks through the screen. After the intruders have been handled, Nobara meets up with Yuji and Megumi. The three talk about how Yuji has gotten stronger and that both she and Megumi will also catch up to him. Later, Nobara attends a meeting when everyone agrees to continue the event. When it is decided that they will play baseball, Nobara plays as the third baseman. When she is up to bat, she gets angry that the Mechamaru from the Kyoto team is a pitching machine. When Maki hits Aoi with the ball, Nobara compliments Maki for the pitch. The Tokyo team then head on to win the game.
Days later, Nobara is being driven to another mission, along with Megumi and Yuji, by Akari Nitta. While being driven there, Nobara and the others discuss the circumstance of the case. Once they arrive at their destination, they all find out that there was another victim and that all the victims have attended the same school. Once they arrive at the school, they asks around if the victims had any rumors about them. They find out about Yasohachi Bridge, and that Megumi used to attend the school. After learning of this, they head to the bridge to stake it out. After staking out the place for a while, they head over to a convenience store after to find if they can find any trace of the curse. As they discuss why they can't find any trace of the curse, a student of Saitama Urami East Junior High suddenly shows up with his sister. The sister reveals that she is going through what the four previous students had gone through. After listening to what they had to say, Megumi has Nobara and Yuji head back, since he plans to deal with the situation by himself.
Later that night, Megumi is starting his investigation when Nobara and Yuji show up. The three meet the condition and manages to enter curse's territory. As the three plan to face the cursed spirit, Kechizu shows up which Yuji says that he will take him on. As Nobara and Megumi continue to launch attacks at the spirit, the spirit manages to dodge all their attacks. Nobara and Megumi wonder why they can't harm the spirit, when Nobara is pulled out of the spirits territory by Eso. As Nobara wonders what Eso is, Eso says that he will let Nobara go since they only came here to retrieve one of Sukuna's fingers.
When Megumi manages to get the finger, Nobara notices that he has it and that he must be hurt. Eso starts to head to where Megumi is at, which Nobara starts to follow him. Nobara wonders why Eso is running weird, which Eso tells her that he has a complication with his back. Kechizu and Yuji suddenly appear behind Kechizu, which Eso is distracted long enough for Nobara to attack him. Eso uses Rot Technique: Maximum: Wing King, which Nobara and Yuji notices that the technique is poisonous. As they run away, Yuji is forced to carry Nobara to safety. When they get to far enough, they stop but Kechizu appears and spits blood on Yuji. Nobara is worried about Yuji, but Eso shows up and injures her with his blood.
Eso then activates another technique, which markings appear on the injured area on Nobara and Yuji. Eso explains how the technique works, which Nobara laughs and uses her technique on herself to inflict harm to Eso and Kechizu. Nobara continues to pin Eso and Kechizu still, while Yuji punches Kechizu. Eso manages to charge, which Nobara faces Kechizu while Yuji taken on Eso. Both Nobara and Yuji manages to do massive harm to both Kechizu and Eso by using Black Flash on them. Kechizu tries to attack Nobara, but Nobara uses one of technique to kill Kechizu. Nobara notices that Kechizu's body is not disappearing, she wonders if Kechizu is still alive when a truck comes by. Eso gets on the truck to escape but Nobara uses her technique on Eso. As Eso falls from the truck, Yuji uses this chance to kill Eso.
After taking care of Kechizu and Eso, Nobara and Yuji ask to see how the other is doing. After talking the two head out to check on Megumi. They finding out that Megumi is fine and that he still has the finger. Nobara get angry at Yuji, along with Megumi, when Sukuna eat the finger. Suddenly Akari shows up, which Nobara and the other go with her. Two days later, Nobara talks with Megumi about how Yuji consumption of Sukuna's finger was the cause of the Yasohachi bridge incident and that they should not tell Yuji. Later, Nobara is nominated for a promotion to a grade 1 sorcerer by Aoi Todo.
After the mission is complete, Nobara goes to do some shopping when she encounters a old classmate of Yuji's, Yuko Ozawa. The two head to a diner, where Yuko explains how she likes Yuji and wonders if Nobara is Yuji's girlfriend. Nobara says that she is not dating Yuji and then calls Megumi since he knows more about Yuji. Megumi shows up and Nobara explains the situation to him. Nobara listens as Megumi says that he doesn't think that Yuji has a girlfriend and recalls that Yuji said something about liking tall girls. Nobara and Yuko are glad to hear that, which Nobara calls Yuji to come to the diner. Suddenly Yuji shows up, which Nobara worries that Yuji won't recognize who Yuko is but Yuji easily realize who Yuko is. After a brief chat, Nobara makes sure to exchange info with Yuko to stay in contact. Nobara also explains how she would be upset if Yuji gets a girlfriend before she gets a boyfriend.
Sometime later, Nobara along with Yuji and Megumi meet up with Gojo, who then takes them to meet with Utahime Iori. Once they meet up with Utahime, Utahime instructs them about how they are going to inspect one of the people whom they suspect is the mole. Utahime tells them that they suspect Kokichi Muta; the real identity of Mechamaru, and explains how his ability works. Once they reach Kokichi's location, they find out that Kokichi isn't in the room and also is the mole after they break down the door.
On October 31, Nobara is with Naobito Zenin and Maki at Shibuya Mark City Restaurant Avenue Entrance when they meet up with Akari. Nobara then listens as Akari informs them about the situation and how they will be on standby for now. Later when the citizens in the screen are attacked by mutated humans, Nobara along with Naobito and Maki head into the screen to protect the people. While dealing with the mutated humans, Akari finds them and informs them what had happened. Maki has Nobara and Akari head off to where Kiyotaka is at while she deals with the mutated humans. Afterwards the two encounter Haruta Shigemo. Nobara has Akari head on while she deals with Haruta. Akari then finds the enemy and figures that Haruta is a mid range fighter. As Haruta figures out where Akari is running off to and chases after her, Nobara quickly goes after him.
As Haruta manages to reach and wound Akari, Nobara tries to attack Haruta but is suddenly wounded by him. Haruta tells Nobara that being strong means nothing against his technique, and that it's about time that he killed them. Nobara thinks about how she has to buy time and asks what the reason is that Haruta is fighting, to which he says that he just wants to have fun. As Haruta attacks Akari, Nobara tells him to stop but Haruta taunts her to make him. Nobara prepares to continue to fight Haruta, but notices a presence and notices that Kento Nanami has arrives. Nobara then watches as Nanami easily deals with Haruta. When Haruta tries to stab Nanami in the back with his sword, Nobara uses her nails to hammer the sword into the wall. As Nanami finishes taking care of Haruta, Nobara thinks about how powerful a Grade 1 sorcerer is. Afterwards, Nobara listens as Nanami explains that Kiyotaka is alive and that Gojo has been sealed. When says that he'll being joining the Zenin family to help out Gojo, Nobara says that she wants to join him but Nanami says that she needs to be a Grade 1 sorcerer for the upcoming fight and that Nobara would just be in the way. Nanami then tells the two to stay here as he heads out.
Later Nobara comes across Mahito and the two have a short chat. After they are done talking, the two prepare to fight, with Nobara recalling what Mahito is capable of. Nobara sends multiple nails flying, but Mahito dodges them. Using a fallen sign, Nobara gets close enough to attack Mahito's clone with her Hairpin technique. Initially it seems that Mahito has the upper hand, only to be shocked when Nobara's Resonance ability attacks his soul directly. The damage of Nobara's attacks on the clone resonates with the original and bounces back to the clone, leaving them both stunned. Mahito's vulnerability allows Yuji to launch a rush of punishing blows. To deal with this crisis, both Mahitos flee from the battle and force their enemies to follow. The two Mahitos run past each other in the subway hallway, trapped between Nobara and Yuji. The double rushes towards Yuji while the original touches a confused Nobara. Yuji kills the duplicate immediately.
Nobara sees her life flash before her eyes. She thinks back to her life in the countryside with Saori and Fumi. She appears standing in a room filled with empty chairs, the seats she reserves for people in her life. She turns around and suddenly sees her chairs being filled with the people, seeing Megumi, Yuji, Gojo, Panda, Toge and Maki all laughing with each other. She then spots a lonely Fumi and thinks back to the promise she made her: that she, Fumi and Saori would all see each other again. She then apologizes to Fumi for not being able to keep her promise.
Back to the present, she turns to Yuji. She asks him, while smiling, to tell everyone it wasn't so bad. Suddenly Mahito transfigures Nobara's face, blasting it open and destroying one of her eyes. Yuji can't do anything but watch.
Later, Arata Nitta, while aiding Yuji and Aoi Todo in facing off Mahito, tells Itadori that he has used his innate technique on Nobara, and since her wounds were relatively newly gained, her chances of survival were non-zero. However he also warns Yuji against holding out too much hope for his comrade's recuperation.