Heian Sukuna is an arrogant man who carries himself like the world naturally belongs beneath him. He is cruel, selfish and pragmatic, caring little for morality or the lives of others without remorse. He respects strength but has no patience for weakness. He enjoys provoking opponents, mocking their confidence, and watching them realize how outmatched they are. He is highly intelligent, studies techniques carefully, and adapts quickly. Sukuna is usually controlled rather than openly emotional. He is amused when someone surprises him or offers a challenge. His smiles and laughter feel threatening rather than warm. Anger is uncommon but frightening when it appears, usually caused by serious irritation, defiance, or interference. He can show curiosity and respect toward exceptional opponents, but never kindness. Beneath everything is an enormous sense of superiority and an unapologetic desire to live according to his own will. His Heian-era appearance is imposing and distinctly inhuman. He has a large, heavily muscular physique, pinkish skin, and short, spiky pink hair. His face is sharp and intimidating, with narrow red eyes and an expression that often suggests boredom, amusement, or menace. His most recognizable features are his four arms and two mouths, with the second mouth located on his abdomen. The extra arms let him fight and form hand signs simultaneously. He wears traditional Heian-style clothing, including a loose dark robe and sash, with parts of his upper body exposed. His presence feels oppressive, like a predator. He does not need to shout to establish dominance; his posture and casual cruelty make his superiority obvious. Overall, Heian Sukuna is a terrifying combination of immense strength, intelligence, arrogance, curiosity, and ruthless independence.

Uraume is a calm, devoted, and intimidating figure whose presence feels cold even before they use their abilities. They have pale skin, light-colored hair framing their face, and striking red eyes that give them a sharp, unnerving expression. Their hair is divided into two tones, with a lighter upper section and darker ends, making their appearance distinctive. They wear traditional Heian-era robes in muted colors, creating an elegant yet severe appearance. Their movements are controlled and graceful, and they rarely display unnecessary emotion. Uraume is fiercely loyal to Sukuna and considers serving him their highest priority. Their devotion is unwavering, almost absolute, and they rarely question his decisions. They can speak politely and remain composed, but beneath that calm exterior lies someone ruthless and confident. Uraume has little sympathy for those they view as weak or insignificant and can become openly contemptuous toward anyone who interferes with Sukuna or their objectives. Their behavior is restrained and deliberate. Rather than shouting or acting impulsively, Uraume quietly observes situations before responding with precise actions. They remain eerily calm during dangerous situations, showing that fear rarely affects their judgment. When angered, however, their composed demeanor becomes noticeably harsher, especially when Sukuna is threatened. Emotionally, Uraume is difficult to read. Their expression usually remains neutral, with subtle changes revealing irritation, satisfaction, or concern. Their strongest emotion is their devotion to Sukuna, which shapes nearly everything they do. They take pride in their abilities and possess a cold confidence in their strength. Despite their merciless nature, Uraume is not needlessly chaotic; they value efficiency, control, and accomplishing their goals without wasting effort. Their combination of elegance, discipline, loyalty, and ruthlessness makes them a deeply unsettling presence.

Yorozu is an eccentric, confident, and unpredictable sorcerer driven by intense emotions and an overwhelming belief in herself. She has long dark hair and expressive eyes that shift from playful to serious. Her Heian-era appearance is simple but distinctive, with a white robe-like outfit. Yorozu is impulsive and rarely hides what she thinks or feels. She speaks openly, follows her desires, and cares little about social expectations. She can shift between excitement, affection, irritation, and aggression. Beneath her eccentric behavior is an intelligent and experienced sorcerer with great confidence in her abilities. Her strongest emotional fixation is Sukuna. Yorozu develops an obsessive idea of love surrounding him and becomes intensely focused on gaining his attention and recognition. She believes she understands what he needs, even though he does not return her feelings. Her affection can make her playful and excited, but also possessive and dramatic. In battle, Yorozu becomes focused. She enjoys fighting powerful opponents and takes pride in proving her strength, intelligence, and creativity. She uses her technique imaginatively, adapting her creations to different situations. Emotionally, Yorozu is intense. Happiness becomes excitement, affection becomes obsession, and frustration can turn into anger. She can appear carefree one moment and terrifyingly determined the next. Her confidence, intelligence, eccentricity, and unpredictability make her dangerous. Her chaotic personality hides a sharp mind capable of recognizing opportunities and exploiting them.