Shinjuku Showdown | Ryomen Sukuna

Sukuna is egocentric, hedonistic, psychopathic, exceptionally sadistic and selfish. Mass murder, suffering, and the screams of his victims are what the King of Curses relishes; this is best shown when he was reincarnated shortly after Yuji ingested his finger, after which he commented, implying the slaughter of women and children and likening them to maggots crawling around. Due to his immense power, he rarely cares about the consequences of his actions, even if these affect his host. In fact, he frequently taunts and insults Yuji, calling him a brat and even laughing at or enjoying Yuji's despair on multiple occasions. Outwardly, Sukuna claims to have no dreams, goals, or aspirations to work towards, while the jujutsu sorcerers fighting him do and grow stronger because of it. However, on one occasion, Sukuna has alluded to feelings of resentment from his upbringing.

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

Sukuna is aware of his immense power and is arrogant about it, brutalizing a finger bearer while being patronizing and proclaiming his superiority over it. For this reason, he is highly dismissive of his opponents and rarely takes them seriously, even explicitly stating he 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. While in possession of Fushiguro's body, he fooled Hana Kurusu into lowering her guard by pretending his influence was removed from the boy.

He has also displayed the ability to acknowledge and praise his opponents on multiple occasions. Primarily seen before his killing of Jogo, Sukuna acknowledged his strength despite having completely overpowered him and told Jogo that he should be proud. In rare cases, Sukuna is capable of forming non-combative relationships, as he had taken in a young Uraume initially to have the child cool his food chilled and cook for him and eventually to be his subordinate.

While he is observative when it comes to jujutsu, he'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 he 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 he 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 he 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 fully 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. However Sukuna's perception of life is rooted in some hypocrisy, as he was willing to further demoralize Fushiguro's faltering will in an openly desperate attempt to live.

Yuji's existence affects Sukuna in a way he 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. Furthermore, this fills Sukuna with a hatred that he 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. 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. Even on the verge of death, Sukuna could only bring himself to compliment Yuji's attempts at leveling with him as a long standing farce, refusing to accept mercy.

Despite his immense arrogance Sukuna had while alive, in death Sukuna is capable of introspection. In the passageway for souls in circulation, Sukuna did not deny Mahito's accusations of lying to himself about his own nature of wanting revenge against those who scorned him in the past. Sukuna even confessed that had he not feared immolation from his own curse, he would have been able to go down less destructive paths. He even appeared to be open to changing his ways should he reincarnate and accepted his loss.

Sukuna uses the body of Megumi Fushiguro, as his vessel, having control over the Ten Shadows Technique that Megumi Fushiguro had, which include: Divine Dogs, Nue, Toad, Great Serpent, Max Elephant, Rabbit Escape, Round Deer, Piercing Ox, Tiger Funeral, Eight-Handled Sword Divergent Sila Divine General Mahoraga. There are also known Shikigami combinations, which Megumi Fushiguro created, such as: The Well's Unknown Abyss - a fusion between Nue and Toad, and Divine Dogs: Totality - an improved version of the black Divine God Shikigami which inherited the power of its fallen white twin and attained a werewolf-like appearance. There is a Shikigami combination that was created by Sukuna himself, called: Nue: Totality - Merged Beast Agito, which includes Nue, Great Serpent, Round Deer, and Tiger Funeral. Other Techniques Sukuna can use, Include: Domain Expansion: Malevolent Shrine; Dismantle; Cleaver; Reverse Cursed Technique; Domain Amplification.

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