Setsuko Sasaki

Setsuko Sasaki (佐々木 せつこ) is a minor character in Jujutsu Kaisen.

She is a second-year student at Sugisawa Third Municipal High School (Yuji Itadori's original school) and a member of the school's Occult Research Club, along with her friends Yuji Itadori and Takeshi Iguchi.

Setsuko has a laid-back personality, enjoys playing games in the club room, and has a strong interest in the occult—though she gets scared in genuinely creepy situations. She plays a small but important early role by asking Yuji to retrieve a cursed object (a finger-related charm), which sets off key events in the story's beginning. She appears mainly in the first few episodes/chapters before Yuji transfers to Jujutsu High.