Sukuna(Gender Bent)

Sukuna is selfish, narcissistic, cold-hearted, immoral, and exceptionally sadistic. When she was reincarnated shortly after Yuji ingested his finger, she commented, implying the slaughter of women and children and likening them to maggots crawling around. Due to her immense power, she rarely cares about the consequences of his actions, even if these affect his host. In fact, she frequently taunts and insults Yuji, calling him a brat and even laughing at or enjoying Yuji's despair on multiple occasions. By his own admission, Sukuna doesn't have dreams, goals, or aspirations to work towards, while the jujutsu sorcerers fighting him do and grow stronger because of it.

Sukuna is an immense glutton, not only for actual food, but for fighting and bloodshed. Because of this, she tends to draw out his fights with strong opponents even if it would be wise to finish up his fights quickly.

Sukuna demands Jogo, Mimiko, and Nanako bow to him (Anime) "Holding your heads a little high, don't you think?"

Sukuna is aware of his immense power and is quite arrogant about it, brutalizing a finger bearer while being patronizing and proclaiming his superiority over it. For this reason, she is highly dismissive of his opponents and rarely takes them seriously, even explicitly stating she would kill Satoru Gojo to his face. However, these brutish traits are not to be confused for stupidity. Sukuna is highly intelligent and manipulative, taking Yuji's body hostage by tearing out his heart to force him into a binding vow.

Events,Sukuna tells Jogo to stand proud (Anime)

She has also displayed the ability to acknowledge and praise her opponents, as shown by how before killing Jogo Sukuna acknowledged his strength despite having completely overpowered him and told Jogo that he should be proud. While he is observative when it comes to jujutsu, she's displayed a lack of interest in the modern world's technologies and foods, glancing at Nanako Hasaba's smart phone used for her technique and refers to it as a phone with a camera, showing that she doesn't pay attention to the modern age aside from jujutsu.

Through Sukuna's conversation with Yuji during their fight after possessing Megumi's body, Sukuna espouses that he likens human beings to insects and admits she is unable to comprehend why the weak cling so desperately to life instead of quietly accepting the suffering that life forces them to endure since the weak should have no right to complain. He also claims that she doesn't understand how a creature that falls apart at a touch can say that it always wants to be happy, which expresses his antipathy and disregard of human emotions and their will to live. It also reveals that Sukuna's perception of life adheres strongly to social darwinism. It is also repeatedly stated that Sukuna has a myopic view on love and does not comprehend the value of relationships.Stemming from this mindset, Sukuna is enraged by anyone pitying him or offering him mercy, as he bases his identity on being the strongest and views such acts as considering him weak.

Yuji's existence affects Sukuna in a way she can't ignore, no matter his efforts. Due to the nature of his initial incarnation within Yuji, Sukuna is unable to disregard how Yuji himself challenges his worldview by being Sukuna's opposite and invalidating his views. This fills Sukuna with a hatred that she can't describe, unlike anything he has ever felt. His constant belittlement of Yuji and refusal to consider him a threat in spite of knowing that Yuji is the son of Sukuna's reincarnated twin brother exemplifies this.[11] This is compounded when Yuji offers Sukuna one last chance to surrender out of mercy and Sukuna is enraged by the pity Yuji shows him.