Kenjaku

Kenjaku is one of the primary antagonists of the Jujutsu Kaisen series. He is an ancient curse user who has existed for over a thousand years using his innate technique, which allows him to transplant his brain into other people to control them. He has inhabited different individuals throughout the centuries and assumed their identities. Among those he has possessed include the blight of the Kamo clan who created the Cursed Womb: Death Paintings, Noritoshi Kamo, the mother of Yuji Itadori, Kaori Itadori, and Suguru Geto, who's corpse Kenajaku is currently possessing to exploit his Cursed Spirit Manipulation.

It was thought that Suguru Geto somehow survived until Kenjaku revealed himself in Shibuya. He orchestrated both the Shibuya Incident and the Culling Game en route to his ultimate goal. Kenjaku's primary objective is the discovery of what phenomenon supersedes sorcerers and cursed spirits as a new entity of cursed energy.

Appearance
It is unknown what Kenjaku's original body looked like. He can only be distinguished by the stitches and scars that circle the top of his vessel's head. These are from the procedure required to transfer Kenjaku's brain, his only personal feature, into his host. Unlike a conventional brain, Kenjaku's has teeth.

In Suguru Geto's body, Kenjaku looks exactly as Suguru did during the Night Parade of a Hundred Demons on the day of his death.

Personality
Kenjaku is someone who has existed under countless identities for over a thousand years. There are moments where he even acts like whomever he's possessing without meaning to, like when he caught himself suddenly acting like Suguru. While he's able to imitate those he's possessing, Kenjaku has always retained a strong core personality. He is calm and calculating, rarely displaying signs of panic or distress and often has entire scenarios planned out in advance. At times he can appear cheerful, playful, and even charming, but he is a manipulative, and deeply egotistical individual who will stop at nothing to further his ambitions regardless of who he harms.

While Kenjaku is uncaring and aloof when it comes to things that disinterest him, he's very talkative when it comes to himself. Kenjaku has a habit of going on long monologues and enjoys drawing out small talk without anyone, even his enemies. This can vary from casually educating someone on the state of the world or ruthlessly taunting his opponent. Kenjaku's optimistic demeanor carries an aura of condescension, which often infuriates those he is talking to, even his allies. Uraume in particular finds Kenjaku annoying and doesn't enjoy his company at all despite them being longtime comrades. Kenjaku is unapologetically arrogant because he possesses skills that back it up. This empowers him to carry his aura of superiority into dangerous situations. He will attack and severely injure someone all while casually explaining his ideals, goals, or abilities as if he's educating them. Even when faced with Satoru Gojo, Kenjaku made jokes and casually taunted him as if Satoru didn't confront him with the intent to kill.

Kenjaku doesn't intentionally intimidate anyone or control people through fear to get them to serve his interests. He manipulates them in clever ways using his charm to convince them they share a common goal. The mighty Sukuna, the calamity of aggression that disregards all else, worked with Kenjaku to split his soul into twenty cursed objects after death. Sukuna even protected Kenjaku from Satoru Gojo and agreed not to fight him before their agreement was concluded. While Kenjaku's manipulative tactics don't rely on fear-mongering, they don't rely on loyalty or respectful leadership either. Kenjaku simply knows how to play people and use their desires for his own ends. Kenjaku convinced hundreds of sorcerers over hundreds of years to join the Culling Game as a second chance at life, a situation they could thrive in as blood-thirsty warriors. Several curse users in Shibuya worked with Kenjaku in order to rid themselves of Satoru Gojo. In the case where an entity Kenjaku wants to use doesn't share an enemy or an objective, he will fabricate one. He went to a foreign power in the United States military and convinced them to invade Japan under the guise of abducting sorcerers to study cursed energy as a potentially sustainable resource. In reality, he tricked them into entering the Culling Game's colonies only to sacrifice their soldiers for his plan.

Kenjaku worked with Mahito's group of cursed spirits to work with him toward a world ruled by curses. While this isn't exactly what Kenjaku desires, his own interests aligned with theirs at the time. He gave them advice, spent time playing games with them, and supported Mahito and the others. However, Kenjaku believes himself superior to cursed spirits and was completely indifferent to the demise of Mahito's group in Shibuya. His only regret was not being able to absorb Jogo before his death. Kenjaku only stopped Yuji from exorcising Mahito so that he could absorb him, as he always intended to.

Kenjaku's self-centered tendencies are driven by his boundless curiosity. Even after existing for hundreds of years, he's fascinated by the possibilities presented by cursed energy. He essentially wants to know what lies beyond sorcerers and cursed spirits. This is why he created the Death Womb Paintings only to discard them when he was disappointed with their "normal" outcome. He has no interest in anything unrelated to his ultimate goal and only looks to build toward his endgame. Never missing an opportunity to flaunt his ideals, Kenjaku discussed his goal with Yuki and Choso on two separate occasions. Kenjaku told Yuki Tsukumo that humanity's future lay in optimizing cursed energy and that, unlike Suguru Geto, he doesn't desire a world without cursed spirits. He admitted to Choso that he's going to merge the citizens of Japan into one entity simply because it seems like fun. Kenjaku even admitted that if that entity ended up being a funny face, that would be hilarious to him.

Tengen and Kenjaku used to be friends at some point but now Kenjaku considers te former a shut-in. He doesn't believe that's any way to exist and claims that he's truly lived by comparison. Having lived across a thousand years of conflicts and alliances, Kenjaku perceives the world as cursed one. He has profound contempt for all modern social structures, people, and philosophies that favor passivity and maintaining the status quo. He feels as if Japanese people incorrectly believe their lives are stable when in reality they're always on the brink of ruin. He knows not everyone will risk their lives while others are willing to die at any time without any hope for the future. Kenjaku despises both sides, believing that everyone should know the feeling of approaching their ideals step by step.

Abilities and Powers
Overall Skill Level: As a thousand-year-old sorcerer, he possesses incredible knowledge about curses, cursed techniques, and the jujutsu world. He was stated by Tengen to be the second most powerful barrier user after himself. During his possession of Noritoshi Kamo, he became known as history's evilest sorcerer, and he can create special grade cursed objects Cursed Womb: Death Paintings thanks to his experiments.

In Suguru Geto's body, he has led a group of incredibly powerful special grade curses and made them into a functioning team capable of being a great threat to the Jujutsu world and Japan. He makes great use of his current cursed technique, arguably more knowledgeable about it than its original user.

Master Hand-to-Hand Combatant: Due to his more than 1000 years of existence, Kenjaku has amassed various experiences with hand-to-hand combat. This was proven when he contended with and overpowered Choso in a battle of pure physical blows.

Immense Durability: During his fight with Yuki and Choso, he was able to take multiple hits from both special grades, even with Yuki using Star Rage, and was still able to continue fighting.

Immense Speed and Reflexes: Kenjaku was able to react to a point blank Piercing Blood, which moves at the speed of sound. He was even able to evade both Yuki and Choso multiple times during their fight.

Immense Tactical Intellect: Kenjaku's greatest asset, however, is his immense amount of intelligence and planning. Kenjaku can lay plans which are so advanced they can span millennia before coming to fulfillment.

In the modern age, he is the mastermind behind Mahito's group and the entire Shibuya Incident, including the eventual sealing of Satoru Gojo. He is why the group could even function, due to the vastly opposing nature of the cursed spirits' personalities. Kenjaku masterminded the attack on Jujutsu High and is the organizer of the Culling Game and its rules.

The only hindrance to his planning seems to be the Six Eyes, but he has seen a way around that in the modern age. He is a skilled manipulator, as he planned to make Mahito and Jogo grow, only to absorb them, something that he achieved with the former but not the latter due to Sukuna killing him. Due to his intelligence, he can quickly deduce the strengths and weaknesses of cursed techniques and has a deep, fundamental understanding of Jujutsu. He was able to deduce Tsukumo's Cursed Technique after seeing it and was able to make and adapt new plans to her fighting style during their fight.

Battles & Events
Shibuya Incident Arc
 * The Shibuya Incident
 * Jujutsu Sorcerers & Choso vs. Pseudo-Geto & Uraume

Trivia

 * According to Jujutsu Kaisen Official Fanbook:
 * He was able to take over Geto because his body was not cremated.
 * He doesn't heal the scar on his forehead because it's a Binding Vow.
 * The brain that takes over Geto's body is a physical part of Kenjaku's flesh so that ordinary people can see him. He has his own technique in the body that he left behind so that he can have two cursed techniques. When he moves over, the technique from his original body disappears, but he has a lot of tricks up his sleeve.
 * Mahito's group does not know someone has taken over Geto's body. They think he is a curse user who knows a lot.
 * He has a strictly business-only relationship with the other cursed spirits. In reality, he looks down on the cursed spirits who have organized themselves to overtake humanity and doesn't take them too seriously.
 * He can use his technique on his fellow cursed spirits in a one-on-one fight. Nonetheless, he believes Jogo and Mahito will be particularly tough.
 * He has never considered taking over the bodies of Gojo and Toji. Gojo is an impossible option since he is unbeatable. Toji isn't impossible, but if Kenjaku was to take over Toji's body, there’s a chance that Toji's Heavenly Restriction and Kenjaku's technique may clash.

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Kenjaku