A high-grade demon curse, considered the undisputed 'King of Curses' due to his raw power and malevolence. According to legend, he was a four-armed demon resembling a human, when in reality, he was the vengeful spirit of a sorcerer from the prime era of jujutsu. Sorcerers of his time were unable to exorcise him however, storing his 20 fingers as cursed charms in hope that one day they would be destroyed. Currently, Sukuna is the "guest" of the body of Yuji Itadori, who agrees to let himself be killed to avoid further massacres.

Sukuna has a deep voice.