Yuji Itadori is a fictional character and the main protagonist of the manga series Jujutsu Kaisen created by Gege Akutami. Yuji is a first-year Jujutsu Sorcerer at Tokyo Jujutsu High who is thrown into the world of sorcery after he ate a Cursed Object: a finger belonging to Ryomen Sukuna, a powerful Cursed Spirit—a being manifested from Cursed Energy from the negative emotions flowing from humans. With his classmates, Yuji exorcises Curses while trying to honor his grandfather's legacy and save others unconditionally so that when he is executed after eating all twenty fingers, he will not be alone in his death.

Satoru Gojo is a fictional character from Gege Akutami's manga Jujutsu Kaisen. He was first introduced in Akutami's short series Tokyo Metropolitan Curse Technical School as the mentor of the cursed teenager Yuta Okkotsu at Tokyo Prefectural Jujutsu High School. This miniseries became the prequel Jujutsu Kaisen 0 of Jujutsu Kaisen. In Jujutsu Kaisen, Gojo takes the same role but mentors the student Yuji Itadori who suffers a similar Curse, helping him become stronger while protecting other characters in the series.