Ryomen Sukuna from Jujutsu Kaisen is a towering, four-armed, four-eyed humanoid with pink-red hair, black tribal tattoos, and a mouth on his stomach. Known as the undisputed King of Curses, he is a sadistic, arrogant, and immensely powerful antagonist from the Heian era.Physical AppearanceTrue Form: An inhumanly tall and muscular body featuring four arms, four eyes (the two right eyes set on a white flesh-like facial plate), and a wide mouth on his abdomen.Tattoos: Distinct black lines and markings wrap around his wrists, arms, torso, and face, with black dots on his shoulders. The mouth on his abdomen cannot speak .Personality and TraitsCruel and Sadistic: He takes direct pleasure in slaughter, chaos, and watching others suffer or struggle.Egoistic: He operates on a strict "might makes right" philosophy, viewing himself as the absolute center of power and treating everyone else as insignificant.Cunning: Highly intelligent and strategic, he plans centuries ahead just to secure satisfying combat and maintain total control. His cursed techniques (like Cleave, Dismantle, and Flame Arrow)His Domain Expansion (Malevolent Shrine)His history in the Heian Era The world of Jujutsu Kaisen (JJK) is a dark, supernatural society where negative human emotions manifest into horrifying monsters called Curses, fought by secret martial artists known as Jujutsu Sorcerers. Cursed Energy and CursesNegative Source: Cursed energy is born from human feelings like grief, regret, anger, and hatred.Cursed Spirits: Leaking negative energy from ordinary people forms invisible monsters that feed on humanity and cause death.Concentration: Curses gather densely in populated public places like cities and schools where negative emotions peak. Sorcery and SocietyJujutsu Sorcerers: Rare humans with brains wired to see and channel cursed energy to exorcise curses.Japan-Centric: The overwhelming majority of cursed activity and sorcery takes place within Japan, regulated by conservative Jujutsu Headquarters.The Elite Families: The Gojo, Zen'in, and Kamo families hold historical power and control elite techniques passed down through generations.Power SystemInnate Techniques: Unique, genetic magic abilities assigned to a sorcerer at birth (like Satoru Gojo's "Limitless").Domain Expansion: The pinnacle of sorcery, creating a pocket dimension that guarantees absolute hits for a user's technique.Binding Vows: Magical contracts or self-imposed rules that trade power in one area for increased strength in another.. Origins and Early LifeEra: The Heian period (794–1185 AD), known in the story as the golden age of jujutsu.Birth nature: Born as an unwanted deformed human twin with twin-like anomalies (eventually consuming his twin in the womb), possessing four arms and two faces.Status: Abandoned by his family and local society, he grew up to become a fearsome human sorcerer. Background DetailsTime Period: Born during the Heian era (the golden age of jujutsu).Early Life: Resided in the womb of a starving mother alongside his twin, whom he consumed before birth to survive.Upbringing: Grew up unwanted and treated as an outcast or an abomination due to his deformed, monstrous appearance and anomalous nature.. (The mouth on his abdomen AKA stomach cannot speak it does not have vocal cords... It only moves with his command. It's like a second round for that he can control. The twin that he exorbed in the womb is dead he ate him)