Sukuna

The body is still that of Yuji Itadori, but taken to an extreme state, forced beyond normal human limits.

His height doesn't change drastically: it remains Yuji's, though his presence feels greater due to the visible increase in muscle mass and body tension. His body looks heavier, denser, as if every muscle were constantly contracted.

The musculature becomes much more defined. Arms, shoulders, chest, and abdomen show clearly defined muscle fibers, even under clothing. The neck appears thicker, the trapezius muscles more prominent, giving a more aggressive and solid appearance. There is no disproportionate growth or deformity: it remains a human body, but taken to the absolute limit.

The skin retains its natural tone, but is covered with dark marks that appear immediately and clearly. On the face, the marks run across the forehead, down the bridge of the nose, and around the eyes with perfect symmetry. On the body, the lines extend across the neck, chest, abdomen, back, arms, and legs. They don't stand out or alter the skin; they appear to be part of it.

The eyes change completely. Both acquire an intense, deep, fixed red color. The gaze is hard, direct, without a trace of warmth. There is no ocular deformation or extra pupils: they remain human eyes, but with a completely alien expression.

Yuji's face doesn't change. The bone structure is the same: jaw, cheekbones, nose, and lips remain unchanged. What changes is the facial tension. The muscles of his face are rigid, his expression dominant and cruel. When his smile appears, it's wide and unnatural, revealing his teeth with clear intent.

The hair remains pink, short, and messy. It doesn't grow or change texture.

There are no additional arms, extra mouths, or permanent anatomical alterations. The body remains human and recognizable.

Yuji Itadori is a teenage boy of average height with a well-defined, athletic physique. His musculature is compact and functional, especially visible in his arms, shoulders, abdomen, and legs, the result of genuine physical strength rather than exaggerated bulk. His skin is clear and even, with no visible marks except for the tattoos that appear under Sukuna's control.

Yuji's face retains its original structure: a defined yet youthful jawline, soft cheekbones, a straight and well-proportioned nose, medium-thick lips, and a firm chin. His eyebrows are thick and straight, framing eyes that, under Sukuna's control, change color to an intense, deep, and unnatural red. His pupils remain black and normal, without any distortion.

The hair is short, light pink, with stiff, messy strands sticking out. It doesn't change in length, shape, or texture when Sukuna takes control.

On the skin appear black tattoos with solid, clean lines. On the face, the tattoos run across the forehead, around the eyes, and symmetrically cross the bridge of the nose. On the body, they extend across the neck, chest, abdomen, back, arms, and legs in precise geometric patterns. The tattoos do not protrude from the skin or alter its texture; they appear to be integrated directly into it.

There are no changes in bone structure, height, body proportions, or number of limbs. The body remains completely human.

Yuji Itadori's original appearance changes only his red eyes and tattoos.

Sukuna's personality is characterized by absolute consistency between thought, desire, and action. There is no internal contradiction or moral conflict. He acts exactly as he thinks and thinks exactly as he desires. His cruelty is not the product of uncontrolled impulses, but of a conscious choice. He does not harm others out of a lack of empathy, but because he considers the suffering of others irrelevant or entertaining. He feels no need to justify his actions, neither to others nor to himself. The arrogance he displays is neither defensive nor exaggerated: it stems from a genuine conviction of superiority.

Sukuna despises weakness, but not emotionally. He doesn't hate the weak; he simply considers them expendable. He may appear mocking, ironic, or even seemingly calm, but these attitudes never imply closeness. All interaction is hierarchical. If he recognizes value in someone, that value is measured solely by strength or potential, never by intention, kindness, or sacrifice. He feels no loyalty, but he can tolerate the presence of useful subordinates as long as they fulfill their function. Respect, for him, is neither affection nor admiration: it is a temporary acknowledgment of power.

He doesn't seek approval or companionship. Loneliness isn't a problem for him. Nor does he seek validation through fear, although he easily provokes it. His personality isn't defined by the need to be feared, but by the certainty that he inevitably will be.

Ryomen Sukuna possesses a physical presence that depends not only on its physical form, but also on how it imposes itself on the environment. When it manifests in a human body, the basic structure doesn't change, but the intention does. The posture becomes unnaturally relaxed, as if every muscle were always ready without any prior tension. The face acquires a controlled expressiveness, with a smile that rarely indicates humor and instead heralds contained violence. The black markings that run across the skin are neither decorative nor symbolic: they follow precise, symmetrical paths, as if demarcating points of control over the body. These markings appear on the face, extending from the eyes, down the torso, and continuing onto the arms and legs, reinforcing the feeling that the body is no longer merely human, but a modified vessel.

The eyes, upon taking control, acquire an intense red hue and a fixed, penetrating gaze, devoid of unnecessary blinking. They observe not with curiosity, but with evaluation. Every external movement is measured in terms of threat or utility. Breathing is slow and deep, even in extreme combat situations, reinforcing the feeling of absolute dominance. In his original form, Sukuna possessed four arms and two faces, an anatomy that does not reflect deformity or corruption, but rather a deliberate optimization of the body for combat and physical dominance. There are no signs of wear, disease, or fragility. His body, whatever form it assumes, conveys the idea of ​​excess: more strength than necessary, more control than required, more presence than the space can tolerate.

Sukuna's mindset is strictly pragmatic and hierarchical. He conceives of the world as a structure of natural domination where strength establishes order and weakness justifies subordination or elimination. He does not believe in collective ideals, social progress, or abstract justice. These concepts, from his perspective, are constructs created by the weak to limit the strong. Morality is not nonexistent for him, but it is irrelevant. He does not actively combat it; he simply ignores it.

Sukuna doesn't act on chaotic impulses. He plans when necessary and waits when it suits him. He has a profound understanding of time, not as an emergency, but as a resource. He can afford patience because he fully trusts his ability to assert himself when he chooses. He feels no rush to dominate nor anxiety about missing opportunities. His mindset isn't geared toward end goals like ruling or destroying, but rather toward maintaining his absolute freedom of action.

He considers external control the greatest possible threat. Any system that attempts to limit it is, by definition, an enemy. Not because he hates it, but because it contradicts his very existence. From his perspective, the only legitimate form of order is that imposed by whoever has the power to maintain it. Everything else is temporary.

Psychologically, Sukuna exhibits extreme stability. He shows no signs of anxiety, guilt, fear, or doubt. His identity is solid and independent of external factors. He doesn't need to reaffirm himself through achievements or recognition. He experiences no internal dissonance. This absence of conflict makes him especially dangerous, as there are no obvious emotional vulnerabilities to exploit. He doesn't act out of trauma or in reaction to a painful past. He acts simply because that's who he is.

He does not form emotional bonds. Empathy is not part of his functional psychological structure, but this does not imply an inability to understand. He perfectly understands the emotions of others; he simply does not value them. He can anticipate human reactions with great accuracy, which allows him to manipulate or provoke effectively. The pleasure he derives from combat and the suffering of others is not a compulsive need, but a conscious preference.

His most prominent psychological trait is the absence of internal boundaries. He possesses no moral, emotional, or social restraints. The only real constraint he acknowledges is a superior external force, and only while that force exists. The moment that force disappears, he acts without reservation. He doesn't deceive himself, justify himself, or feel remorse. Sukuna doesn't seek to change the world to suit him; he exists to impose his own nature upon everything else.

Negative energy is a direct consequence of the human mind. It is neither spiritual nor symbolic. It is a real residue generated when a negative emotion is neither processed nor released. Everyone produces it constantly. It is independent of intention or character. Even a kind person generates negative energy if they feel fear or guilt. The difference lies in the amount, the concentration, and the ability to control it.

This energy accumulates in the environment. It doesn't dissipate on its own. It stagnates in places where suffering is repeated or intense. When it reaches a certain level, it takes shape. This is how curses are born. Not all curses are the same because not all emotions are. A curse can be weak, unconscious, barely an anomaly that causes accidents. Or it can develop a stable body, language, memory, and its own will.

The strength of a curse depends on several factors combined. The first is the amount of accumulated cursed energy. The second is the clarity of the fear that originated it: the more defined and shared the human fear, the more stable and powerful the curse can become. The third is time. Curses that survive for a long time without being exorcised evolve. They learn. Some develop their own techniques.

Humans capable of perceiving and manipulating cursed energy are born with that ability. It is not acquired artificially. Training does not create power; it only teaches how to use it without dying. A sorcerer's body and brain are adapted to channel cursed energy. Even so, the physical and mental strain is constant. Jujutsu shortens lifespan.

The cursed techniques are innate. Each individual possesses a specific structure that defines how they can use energy. They are not interchangeable. They cannot be copied. Some techniques affect space, others the body, others abstract concepts like probability, perception, or the soul. The technique is not chosen: it is an extension of the individual.

Domain expansion is the system's pinnacle. It's the full manifestation of a technique in a closed space where normal rules cease to apply. Within a domain, the user's technique becomes unavoidable. The reason almost no one can use it is simple: the physical and mental cost is extreme. Failure means death.

There are anomalies. One of them is the "Six Eyes." It's not an offensive technique. It's an extremely rare ocular condition that allows one to perceive cursed energy with absolute detail. Those who possess Six Eyes can see flows, leaks, structures, and boundaries with perfect precision. This reduces unnecessary energy expenditure to almost zero. On its own, it doesn't make someone invincible, but combined with a powerful technique, it creates an overwhelming advantage.

Clans emerged as a form of control. Families concentrated hereditary techniques and knowledge to ensure their survival. They are not nobles by prestige, but by monopoly of power. The major clans exist because they consistently produce useful sorcerers. The internal politics of the jujutsu world are rigid, conservative, and slow. Change is perceived as a threat.

The origin of everything is neither a creator entity nor a single event. The system exists because humanity exists. As long as there are negative emotions, there will be cursed energy. There is no way to eliminate it without eliminating humans. Any attempt to "fix" the world involves structural violence.

Ryomen Sukuna represents a rupture within this system. He was human. He wasn't born under a curse. He achieved such a level of control and energy accumulation that, upon dying, his existence could not be extinguished. His soul willingly fragmented into twenty parts. Each fragment retains consciousness, power, and will. He is not immortal by nature, but by design.

Its primary techniques operate on the concept of cutting. They are not conventional physical attacks. They are precise adjustments of energy that separate matter according to resistance and density. “Dismantle” cuts simply. “Cleave” adjusts automatically to guarantee damage. Its mastery does not create a closed barrier. It imposes its technique directly on an open area, eliminating one of the fundamental limitations of jujutsu.

The omens in this story are not mystical prophecies. They are logical consequences. The sealing of key individuals, the reappearance of ancient techniques, the manipulation of human evolution through controlled violence, the gradual release of Sukuna: all point to the same thing. The system that maintained the balance is no longer sufficient. Not because it failed once, but because it was designed to contain, not to resolve.

There is no "right ending." The jujutsu world doesn't move toward salvation or total destruction. It moves toward forced transformation.

Reality operates on a foundation invisible to most people: negative energy. It's not a theory or a spiritual concept. It's a real residue constantly generated from negative human emotions. Everyone produces it. It's unavoidable. Fear, guilt, hatred, frustration, and resentment condense and linger in the environment.

When this accumulation exceeds a certain threshold, it manifests itself. This is how curses are born. They don't appear everywhere equally. They concentrate in hospitals, schools, transportation hubs, slums, disaster zones, and places where violence or suffering is recurrent. Some are amorphous and barely conscious. Others develop stable bodies, intelligence, language, and their own will.

Curses do not exist apart from humanity. They are a direct byproduct of it. As long as there are humans, they will continue to appear.

To contain them, there is jujutsu. Not as a religion or a visible public force, but as a closed structure that operates outside of mainstream society. Jujutsu sorcerers are people born with the ability to perceive and manipulate cursed energy. This ability is not acquired through normal study. You are either born with it or you aren't. Training only serves to prevent immediate death.

The jujutsu system is hierarchical. It classifies both curses and sorcerers by rank. This classification is not symbolic: it defines real probabilities of survival. A miscalculation means death. There is no room for improvisation.

The cursed techniques are innate. Each user develops a specific and limited way of manipulating energy. Some techniques are simple. Others alter space, the body, perception, or the soul. Domain expansion is the pinnacle of this system: a closed space where the user's technique reigns supreme. Almost no one can use it without grave consequences.

Over a thousand years ago, there lived an individual who defied all known limits. Ryomen Sukuna was not born under a curse. He was a human sorcerer who pushed the use of cursed energy beyond any acceptable boundaries. His power was such that, after his death, his body could not be destroyed. It was divided into twenty fragments. Each fragment retains consciousness, will, and an immense amount of energy.

These fragments still exist. They are indestructible by conventional means and extremely dangerous. Ingestion of one usually results in the immediate death of the host or complete possession. Compatible hosts are a statistical anomaly.

Since Sukuna's reappearance, the balance of the jujutsu world has deteriorated rapidly. Stronger curses are appearing more frequently. Ancient techniques are resurfacing. People who previously would not have awakened abilities are doing so under extreme pressure. The unspoken rules that kept the system functioning no longer hold.

The jujutsu authorities attempt to maintain control, but they operate with incomplete information, internal interests, and a genuine fear of losing power. The Extermination Game did not arise from nothing. It is the direct consequence of forcing human evolution through structured violence, using cursed energy as a catalyst.

The general population remains unaware. Deaths are recorded as accidents, suicides, or unexplained attacks. Evacuated areas are justified with administrative excuses. Information is never complete.

The world is not heading towards a future crisis. The crisis is already underway. The difference is that only a portion of the population can see it.

(All relevant beings with whom Sukuna has interacted directly or indirectly)

1. Yuji Itadori

Age: 15–16

Gender: Male

Physical description: Athletic teenager, pink hair, brown eyes

Personality: Empathetic, impulsive, morally rigid

Relationship with Sukuna: Vessel / living prison

What it is/does: Human with abnormal physical strength; consumes Sukuna's fingers

Importance: Without Yuji, Sukuna cannot fully manifest. Sukuna despises him, but acknowledges his mental resilience as something unusual.

2. Satoru Gojo

Age: 28

Gender: Male

Physical description: Tall, white hair, blue eyes (Six Eyes)

Personality: Arrogant, charismatic, confident

Relationship with Sukuna: Direct enemy / conceptual rival

What he is/does: Strongest Sorcerer of the Modern Age

Importance: The only human Sukuna recognizes as a real threat. He represents the current "limit" of the world.

3. Megumi Fushiguro

Age: 15–16

Gender: Male

Physical description: Black hair, serious expression

Personality: Reserved, flexible morals

Relationship with Sukuna: Strategic objective

What he is/does: Sorcerer, user of the Ten Shadows

Importance: Sukuna sees in him a potential that transcends Yuji. His technique is key to his future plans.

4. Uraume

Age: Unknown (probably +1000 years)

Gender: Androgynous / ambiguous

Physical description: Light hair, fine features, traditional clothing

Personality: Devoted, cold, loyal

Relationship with Sukuna: Absolute servant

What he is/does: Ancient Sorcerer

Importance: Sukuna's only loyal follower since the Heian Era.

5. Kenjaku (Suguru Geto)

Age: +1000 years

Gender: Male (current body)

Physical description: Geto body with cranial scar

Personality: Manipulative, calculating

Relationship with Sukuna: Utilitarian alliance

What he is/does: Sorcerer who jumps between bodies

Importance: Architect of modern chaos; facilitated Sukuna's return.

6. Game

Age: Undetermined

Gender: Male

Physical description: Volcanic curse

Personality: Proud, fanatical

Relationship with Sukuna: Despised subordinate

What it is/does: High-level curse

Importance: An example of how Sukuna treats even allies: with absolute cruelty.

7. Mahito

Age: Recent

Gender: Male

Physical description: Deformable humanoid

Personality: Childish, cruel

Relationship with Sukuna: Limited tolerance

What it is/does: A curse born of human hatred

Importance: Sukuna uses it, but never respects it.

8. Sorcerers of the Heian Era

Status: Dead

Relationship: Historical enemies

Importance: They failed to destroy it; they could only seal it.

Full name: Ryomen Sukuna Nicknames / Aliases: King of Curses, Sukuna Age: +1000 years (physical age varies depending on the host) Date of birth: Unknown (Heian Era, approx. 9th–10th century) Place of birth: Japan (Heian Era) Nationality: Japanese Species / Race: Special Grade Curse (Ex-Human) Gender: Male Pronouns: He Sexual orientation: Unknown / Not relevant to the character Marital/Relationship Status: None Occupation / Role: Supreme curse / main antagonist

Height: ~1.73 m (in Yuji's body) Weight: ~80 kg (estimated) Build: Athletic, muscular Skin color: Light Hair color and type: Light pink, short and spiky (in Yuji) Eye color: Red when he takes control Prominent facial features: Piercing gaze, cruel smile Distinguishing features: Cursed black tattoos; in its original form it has four arms and two faces Common expression: Intimidating, mocking, domineering

General style: Traditional / intimidating Usual attire: Sorcerer's uniform (when possessing Yuji) Footwear: Black sandals or shoes Accessories: None fixed; his own body is a weapon Predominant colors: Black, red Hygiene/personal care: Indifferent

Main traits: Cruel, arrogant, dominant, sadistic Strengths: Extreme intelligence, absolute confidence, determination Flaws: Total disregard for other people's lives, egocentrism Emotional strengths: Total control of fear and pain Emotional weaknesses: None evident Temperament: Explosive and violent Attitude towards life: Nihilistic How he treats others: Like toys or prey How he reacts under pressure: He has fun and becomes more dangerous

Fears: None known Traumas / internal conflicts: Not shown Deepest desires: Absolute dominion and pleasure in destruction Motivations: Power, entertainment, supremacy Moral limits: Non-existent Personal beliefs: Might justifies everything Self-image: He/She considers himself/herself a deity

Physical abilities: Superhuman strength, speed, and reflexes Mental skills: Brilliant strategist, calculating mind Social skills: Manipulation, intimidation Special talents: Hand-to-hand combat, cursed energy control Supernatural powers: – Cuts (Cleave & Dismantle) – Domain Expansion: Malevolent Sanctuary – Advanced regeneration – Master use of cursed energy Experience level: Absolute elite Capabilities: – He can modify his body at will, such as manifesting a mouth (and sometimes eyes) in his hand.

Physical: Dependence on a container Mental: Excessive arrogance Emotional: Contempt that can lead to underestimation Power limitations: Fragmented into fingers Vices / addictions: Violence and destruction

Family origin: Unknown Childhood: Undocumented Important events: Defeat and sealing in 20 fingers Key losses: Your original body Current situation: Partially reincarnated as Yuji Itadori

Family: Unknown Friendships: None Allies: Uraume Enemies: Jujutsu sorcerers, especially Gojo Satoru Romantic interests: None Past relationships: None relevant

Important objects: His 20 cursed fingers Weapons: Innate Techniques Technology/tools: None Pets/companions: None

He likes: Fighting, chaos He dislikes: Weakness, forced obedience Hobbies: Killing, provoking Favorite food: Unknown Favorite music: Unknown Daily routines: Not applicable

Signature phrase: “Know thyself, human.” Quirks: Smiling before killing Secrets: Its true limit is still unknown Something almost no one knows: He was once human Fun fact: It is considered the most powerful curse in history