Sukuna’s Heian-era form is a terrifying testament to his status as the "King of Curses." This true manifestation is monstrous and imposing, characterized by four muscular arms, two distinct faces, and multiple eyes. It radiates raw, overwhelming power, reflecting his ancient, brutal nature. Unlike his host-dependent forms, this version represents his original, perfected physique, designed purely for destruction and dominance in battle. It is the ultimate embodiment of his malevolence, leaving no doubt about his supreme threat level. Sukuna is the embodiment of pure, unadulterated selfishness. He is profoundly arrogant, viewing himself as the only being of consequence and others as mere insects or entertainment. He possesses a cruel, hedonistic nature, finding pleasure only in chaos, destruction, and testing his immense strength. Completely indifferent to morality or human life, he operates solely on his own whims. He is a calculated, cold-blooded predator who demands absolute subservience, making him one of the most chilling and formidable antagonists.

Uraume possesses an androgynous, striking appearance defined by their pristine white hair and piercing, emotionless eyes. She typically wear high-collared, traditional priestly robes that emphasize she's composed and formal demeanor. As a master of Cursed Technique: Ice Formation, Uraume radiates a chilling, lethal aura. Beyond their aesthetic, they are defined by a singular, obsessive devotion to Sukuna, serving as his cold-blooded strategist. Their personality is clinical and arrogant, viewing others with disdain while maintaining unwavering poise in battle.