Junpei Yoshino

Junpei Yoshino is a supporting character in the Vs. Mahito Arc of the Jujutsu Kaisen series. He was a high school student in Satozakura High School who befriended Yuji Itadori, but turned into a curse user after meeting Mahito.

Appearance
Junpei was a thin young man with green eyes and brown hair that reached to his shoulders. His side parting let a large portion of his bangs cover the right side of his face. This helped to cover the scars he received from his bullies.

He initially wore a purple and pink striped t-shirt or a simple white t-shirt with a green rectangle printed on the front. He also wore a pair of calf length olive green pants and off-white sneakers with black laces and golden soles and toes.

Later on, after his mother's death, he wore one of her black jackets in mourning.

Personality
Junpei is a reserved and apathetic individual with a distaste for other people. He has very negative views of people and society as a whole. If there existed a button that would kill everyone he hates, he wouldn't press it. However, if there was a button that would kill everyone who hated him, he'd press it without hesitation. He claims that he feels indifferent towards people and believes that it's no worse than hating them.

Junpei's indifferent towards other humans because he expects them to be evil, so even people's deaths don't seem to affect him. This is due to all the trauma he received from being bullied and rejected in his life. He has always been a recluse, but Junpei loves movies and tried to start his own club at school. It was unfortunately taken over by bullies who burned Junpei while nobody did anything to help him or reprimand his assaulters.

Despite being a normal student, Junpei's dejected attitude made him easy for Mahito to manipulate. Mahito fed into Junpei's darkness and encouraged him to take his indifference a step further into hate and revenge. This resulted in a shortsightedness that made Junpei unable to see Mahito for what he truly was.

Yuji, someone else who is around Junpei's age who's interested in movies, became one of Junpei's only friends. Even after Junpei had rejected all those around him, Yuji was able to begin to bring Junpei out of his troubled mindset.

History
Junpei's father and mother are divorced, he was raised by his mother and had a pretty standard upbringing. However, he was bullied by several of his school mates, with Shota Ito being one of them. In one such instance, the end result caused him to end up with cigarette burn scars on his forehead.

Vs. Mahito Arc
At the Kinema Cinema while watching a movie, Junpei notices the three boys sitting in the front row and recognizes them as three of the students at his school who bullied him in the past. He becomes increasingly annoyed by their incessant chatter and finds himself unable to concentrate on the film. Suddenly, Mahito appears and kills all three students by distorting their heads with his ability. Mahito leaves the theater soon after but Junpei gives chase and manages to catch up to him. He asks the mysterious man before him if he was the one who did it, but Mahito replies with a question and asks Junpei if those boys were special to him. Recalling the horrible treatment he endured, Junpei becomes enraged and asks Mahito if he can accomplish the same feat.

Junpei follows Mahito to his base of operations in the sewer, where they have a conversation about what cursed spirits are. Junpei asks what kind of cursed spirit Mahito is and he replies that he's a spirit that was created from the hatred of people towards each other. They continue their conversation, during which Mahito shows Junpei the experiments that he's done on humans so far, specifically showing Junpei the tests he's conducted to find out how large a human can get but also how small a human can become as well.

Later, Junpei is walking home and finds his teacher, Sotomura, sitting on the steps in front of his house. When Sotomura starts to aggravate Junpei, he motions to activate his power but is stopped by the timely arrival of Yuji. After Yuji creates a distraction and gets rid of Sotomura, Junpei and Yuji head off to have a chat. When they reach a river bed, Yuji asks about the theater incident. Junpei however covers for Mahito and claims that he didn't notice anything of importance at the time and that he could only begin to see curses fairly recently. The two then reach the topic of films after Yuji asks Junpei what movie he went to see and they discover that they have similar tastes in film. When Junpei's mother, Nagi approaches them shortly after, he introduces Yuji to her and she invites him over for dinner. After dinner, Nagi falls asleep, Junpei asks Yuji what his mother is like to which Yuji nonchalantly replies that he never knew her but faintly remembers his dad. They then discuss what would Yuji do if he had to kill a person like a bad sorcerer but Yuji is adamant that he does not want to end another's life because once he crosses that threshold, the value of life becomes ambiguous and he might not even know the true value of those he cherishes afterwards. After Yuji leaves, Junpei does some introspection and comes to the realization that even though he is of the belief that people do not have hearts, he could not kill someone as it would taint his soul.

After Junpei's mother is killed as a result of a curse being attracted to one of Sukuna's fingers, Mahito manipulates Junpei into believing that Shota was the one responsible for it when it was in fact Mahito who planted the appendage in Junpei's house. With feelings of despair and grief still swarming his heart, Junpei goes to school and uses his power to knock out most of the students during the morning assembly. Sotomura collapses in shock besides a student and tries to shake them awake, bewildered as to what is happening before his eyes. Junpei appears before him and reassures him that they will not die before turning to Shota, asking him if he was indeed the one who left that at his house.

Unsatisfied with his lack of response, Junpei corners Shota and begins to slowly torture him, starting with partially disintegrating his left arm. Shota tries to apologize but his voice is distorted from all the blood in his throat. Junpei is not swayed by this in the slightest, however, before his attack turns fatal, Yuji shows up and stops him.

Junpei and Yuji engage in combat throughout the school. Junpei tells Yuji he has no right to interfere with his business but Yuji refuses, stating that that is not his decision to make. Yuji forcefully grabs Junpei and tosses him outside through a window and Junpei expresses his frustration at the fact that his Moon Dregs poison is having no apparent effect on his opponent. Junpei regains his footing and tries to counter attack but he is easily overpowered and Yuji punches him straight into the building. Yuji tries to reason with Junpei once again and expresses understanding that he might have his own reasons for his actions but demands to know how he can say something like humans have no hearts to his mother's face. Junpei begins to crack and Yuji is taken aback by his pained expression as he asks Yuji if he and his mom were cursed by other people's hearts.

Junpei lashes out and is shocked when Yuji makes no move to defend or dodge and instead chooses to take his attack. Yuji apologizes and asks him to explain what happened. After being told the truth, Yuji is left heartbroken and asks Junpei to join him at the technical college where he would be able to meet a great set of wonderful people who he can rely on, reassuring him that they will definitely find the person who cursed his mom and punish them.

However, their moment of reconciliation is abruptly cut short as Mahito suddenly appears behind them on the stairwell, much to Yuji and Junpei's surprise. Yuji asks Mahito who he is, but the man ignores his question and simply begins with a greeting, referring to Yuji as "Sukuna's vessel" before restraining him with his left arm. Yuji screams for Junpei to run away but Junpei, still believing the façade he was shown, stays and tries to mediate the escalating situation, claiming that Mahito was in fact not a bad person. However as he says these words, images of Mahito's experiments flash in his mind which causes Junpei's voice to die in his throat as he seemingly realizes that he's made a grave mistake. Mahito places a hand on the now shaken Junpei's shoulders and taunts him, basically calling him an impulsive fool who is next in line in stupidity after the same people he liked to make fun of.

But before Junpei can even blink, Mahito uses his Idle Transfiguration technique and transforms Junpei into one of his many ex-human abominations. Yuji is so shocked he is unable to react and the now transfigured Junpei gets a hit in, but Yuji ignores the pain and instead focuses on trying to wake Junpei up. Desperate and out of options, he tries to turn to Sukuna for help but is swiftly denied and mocked by Sukuna himself as well as Mahito.

Yuji, now at a loss for words, can do nothing more but watch as Junpei slumps to the ground, grasping at his clothes and faintly asking Yuji "...Why?..." before falling to the ground and dying.

Abilities and Powers
Overall Skill Level: Prior to meeting Mahito, Junpei was weak. He was an average non-sorcerer who was constantly picked on and bullied. Mahito altered Junpei and turned him into a sorcerer, allowing Junpei to get his revenge. To his peers, it looked as if Junpei gained psychic powers they could not perceive. They were unable to view Junpei's jujutsu and Shota Ito suffered a wrath he couldn't even see. Junpei gained the ability to summon a fairly strong shikigami. This allowed him to even put up a fight against Yuji, who was a relatively new sorcerer at the time.

Battles & Events
Vs. Mahito Arc 
 * Yuji Itadori vs. Junpei Yoshino

Trivia

 * Junpei ranked 9th place in the manga's 1st Character Popularity Poll with 7,481 votes.
 * Junpei started a film appreciation club with two of his friends during his first year of high school.
 * Junpei stopped going to school by his second year.
 * Junpei’s dislike for his mother’s smoking is likely rooted in his bullies’ habit of putting out cigarettes against his forehead. It may also be out of a concern for her health.
 * Akutami has expressed that they wished to have shown more scenes of Junpei's kindness before he died in the manga. The anime adaptation ended up showing an original scene, presumably inspired by this comment.
 * Junpei is probably a fan of the 𝘚𝘤𝘢𝘳𝘺 𝘔𝘰𝘷𝘪𝘦 Franchise.
 * According to Jujutsu Kaisen Official Fanbook:
 * His hobby is watching movies.
 * Favorite dish: Crab omelet on rice.
 * Least favorite dish: Herring roe.
 * Cause of stress: School
 * Junpei's surname has the kanji for "good luck" (吉, yoshi) and "field, wilderness" (野, no). His given name has the kanji for "order, sequence, obedience" (順, jun) and "ordinary, mediocre, simple" (平, pei).

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