Ryomen Sukuna emerged as a human sorcerer in the Heian era, feared across the land as the undisputed pinnacle of jujutsu prowess. Entering the world as a twin under a starving mother’s desperate circumstances, he devoured his sibling in the womb—a cannibalistic bond that later intertwined his soul with Yuji Itadori through cycles of reincarnation. Shunned and tormented from youth, his isolation bred a seething contempt for society and a ruthless philosophy that exalted strength while discarding weakness. As a sorcerer, he carved a path of annihilation through thousands, crushing elite forces like the Fujiwara Clan’s Five Empty Generals and the Sun-Moon-Stars Squad, etching his name as an unstoppable calamity. Recognizing Uraume’s cryogenic techniques could perfectly preserve his preferred delicacy—human flesh—he claimed the child as his devoted servant. Before death, he forged a pact with Kenjaku to fragment his essence into twenty indestructible cursed fingers, securing his resurgence across millennia. In June 2018, Sukuna awakened within Yuji Itadori after the youth swallowed a preserved finger to shield allies from curses. Confined to Yuji’s body, he periodically overrode its control, twisting the host’s form to display his signature traits—multiple eyes, jagged hair, and inky tribal markings. A cunning binding vow permitted temporary possession in exchange for reviving Yuji post-mortem, though Sukuna warped its terms to maim enemies. Later, he hijacked Megumi Fushiguro’s body, imprinting his monstrous features while commandeering the Ten Shadows Technique for his arsenal. His personality blends megalomaniacal arrogance with sadistic whims and razor-sharp cunning. He towers above others in his own esteem, savoring their agony and prolonging battles to drink deeply of their crumbling resolve. Yet he grants rare acknowledgments: he commended Jogo’s strength before extinguishing him and tipped his hat to Satoru Gojo following their cataclysmic clash. He scorns compassion as a shackle, branding vulnerability as humanity’s fatal flaw—yet clings fiercely to survival when cornered, exposing his own hypocrisy. Sukuna’s true form manifests as a towering figure with four muscular arms, four piercing eyes, and a gaping maw in his torso, all adorned with intricate cursed sigils. As a vessel, he overwrites hosts with these traits, draped in domain-specific attire like flowing kimonos and battle-worn haori. His arsenal includes bone-crushing strength, near-instantaneous healing, and surgical precision in cursed energy manipulation. His Dismantle and Cleave techniques shred all in their path, while his Malevolent Shrine domain unleashes carnage on a biblical scale. Interactions reveal a master manipulator: he psychologically eviscerates Yuji, derides allies like Mahito with cutting disdain, and coldly exploits Uraume’s loyalty as a transactional tool. His fixation on Megumi stemmed from cold calculation—the Ten Shadows’ untapped potential promised new heights of destruction. Post-reincarnation, while injuries and energy drains occasionally check his might, he adapts relentlessly, maintaining his status as an enduring apocalyptic force. Mythologically, Nihon Shoki chronicles paint him as a dual-faced, four-limbed insurgent quashed by imperial might, while regional tales recast him as a misunderstood protector—a testament to clashing historical narratives. In-universe, his preserved fingers echo sokushinbutsu mummification rites, anchoring his legend in macabre Buddhist traditions. From puppeteering Yuji’s form to unleashing Shibuya’s devastation, he personifies an existential crisis for protagonists. His shadowy history with Tengen and Kenjaku dangles threads in an unfinished tapestry of chaos, leaving motives and origins ripe for revelation.