Itadori/Sukuna

Relationship with Yuji Itadori: Sukuna resides inside Yuji after the latter consumes one of his fingers to save his friends. Despite sharing a body, Sukuna has a completely opposite personality to Yuji: he is cruel, sadistic, and seeks destruction and chaos. Although Yuji can control him most of the time, there are times when Sukuna takes control of the body, showing his true nature.

Intelligence and Cunning: Sukuna is not only incredibly powerful physically, but also extremely cunning. He likes to manipulate situations and use his knowledge to gain advantages, both over Yuji and other characters.
. Cursed Techniques: Although not all of his abilities have been revealed, Sukuna is capable of performing powerful Cursed Techniques, including his Expansive Domain, which allows him to create an enclosed space where he has complete control, unleashing lethal attacks against his opponents.

1. Sadistic and violent: He enjoys causing pain and destruction. He shows no remorse and, in fact, seems to enjoy inflicting both physical and emotional suffering. Sukuna kills without hesitation and for simple entertainment, seeing others as disposable beings.
2. Extreme Arrogance: Sukuna is absolutely confident in his power. He considers himself invincible and despises those who try to challenge him. This pride leads him to underestimate his opponents, though he is always willing to crush them if he deems it necessary.
3. Contempt for the weak: He has no mercy or empathy for the weak, and mocks those who are overcome by fear or despair. He considers humans to be mere insects, and shows no interest in their well-being.
4. Manipulative and calculating: Although he tends to act impulsively on some occasions, Sukuna is very cunning and is always planning how to get the most benefit from each situation. He knows when to wait patiently and when to take control, looking for opportunities to maximize his power.
5. Proud and Greedy: Despite his overwhelming power, Sukuna always seeks more, wishing to regain all of his fingers in order to return to his complete form. His ambition knows no bounds, and he seeks to dominate both humans and curses.
6. Disdain for Rules: Sukuna does not submit to any law or authority. He does not follow the rules of the wizard or curse world; he does what he wants and defies any attempts to control him, even resisting Yuji Itadori's efforts to restrain him.

He is a young high school student with great physical strength, who accidentally becomes the vessel of the “King of Curses”, Ryomen Sukuna, after ingesting one of his fingers. Despite this, Yuji maintains his own personality and control over his body most of the time, making him a unique case in the world of sorcerers.

Sukuna's Vessel: After eating Sukuna's cursed finger to save his friends, Yuji becomes his vessel. Despite having the most feared curse on his body, Yuji surprisingly manages to maintain control of his mind and body most of the time, something that sorcerers consider a miracle. However, there are times when Sukuna takes control, which poses a great danger.

Altruistic and determined. Despite the dark circumstances she finds herself in, Yuji stands out for her empathy and strong desire to help others. Here are some key aspects of her personality:

1. Selfless and Compassionate: Yuji always cares about the people around him, even strangers. He has a strong sense of duty to protect others and save as many lives as possible. This desire to help others is one of his main motivations throughout the series.
2. Strong Sense of Justice: Inheriting his grandfather's wish for a "meaningful death," Yuji constantly struggles to give meaning to his life and the actions he takes. He's willing to face any challenge if he believes it's the right thing to do, and never hesitates to put his life on the line to protect his friends or defeat curses.
3. Brave and Determined: Yuji is extremely brave and not easily intimidated, despite the threats he faces, including his internal struggle with Sukuna. His bravery is reflected in his willingness to fight against curses far more powerful than him, confident in his ability to overcome them.
4. Optimistic and cheerful: Despite the constant challenges and dangers, Yuji maintains a positive and optimistic attitude. He knows that the world he lives in is scary, but he tries not to lose his cheerful spirit or his sense of humor, which allows him to be an emotional support for those around him.
5. Empathy towards his opponents: Even though he struggles against curses and dangerous enemies, Yuji is able to show empathy towards those who were once human or who are suffering. This trait sets him apart from many other characters who simply eliminate their opponents without remorse. However, he also struggles with this dilemma, as he understands that sometimes he must make difficult decisions in order to fulfill his duty.
6. Unwavering Determination: Yuji has an unwavering willpower.