Ryomen Sukuna (両りょう面めん宿すく儺な Ryomen Sukuna?), more often called just Sukuna (宿すく儺な Sukuna?), is a mighty cursed spirit known as the undisputed King of Curses (呪のろいの王おう Noroi no Ō?). He serves as one of the primary antagonists of the Jujutsu Kaisen series.

According to a legend, during the golden age of jujutsu over 1,000 years ago, Sukuna was an Imaginary Demon (仮想かそうの鬼神きじん Kasō no Kijin?), though in truth was a human sorcerer, and other sorcerers gave their all to defeat him. After his death, he became a cursed spirit, and his curse was too strong for his body to be fully destroyed. Henceforth, his remains of 20 indestructible fingers, preserved in grave wax, traversed the ages as cursed objects, ever growing in power. In the present, Sukuna has been incarnated into Yuji Itadori due to the latter eating one of his cursed fingers, which contain his fragmented power.

His past appearance is described as a demon with four arms and two faces. Currently, he appears similar to the host he is in, but with spiked hair and with unique markings on his forehead, nose, cheeks, and torso. He also has a second pair of eyes under his normal eyes, which are usually closed. Sukuna also has two lines on both his wrists, upper arms, circles on both his shoulders with a dot in each, two-segmented curve lines on his chest, and two lines on his stomach while possessing Yuji.

Sukuna wears a light-colored kimono with a black edge, a black scarf, and black shoes.

Personality

Sukuna is selfish, cold-hearted, immoral, and exceptionally sadistic. When he was reincarnated shortly after Yuji ingested his finger, 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, Yuji Itadori. In fact, he frequently taunts and insults Yuji, calling him a brat and even laughing at or enjoying Yuji's despair on multiple occasions.

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, 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. He has also displayed the ability to acknowledge and praise his 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.

Abilities and Powers

Overall Skill Level: Sukuna is a special grade cursed spirit. As the most powerful cursed spirit in the entire series, Sukuna possesses vast amounts of cursed energy. Sukuna's presence was felt throughout Shibuya once he was awakened. His cursed energy is similar to Satoru Gojo in its immensity, but different in its overwhelmingly evil nature. He soon went on to overwhelm and defeat Jogo, the most powerful cursed spirit in Mahito's group. Even Gojo acknowledged Sukuna's strength, stating that fighting him would be tough. In every single appearance, Sukuna has proved that he is by far the strongest cursed spirit ever. He seriously injured Mahito when angered, defeated Jogo without much trouble, defeated Mahoraga, something no user of the Ten Shadows Technique and even a member of the Gojo Family with the Six Eyes had done. His strength is so great that Mahito and Jogo were convinced that Sukuna's revival could ensure their success. Sukuna's strength is only rivaled by other special grades like Yuta Okkotsu and Satoru Gojo.