Setsuko Sasaki

Setsuko Sasaki (せつこ) is a second-year student at Sugisawa Third High School and a member of school's Occult Research Club.

Appearance
Setsuko is a teenager with black colored hair that extend to below her ears and styled in a bob, blue eyes, and wears glasses.

Setsuko's outfits consist of her school uniform, a beige colored vest over a white long sleeve shirt and a diagonal stripped tie. She also wears a dark blue skirt, with grey socks, and light colored shoes.

Personality
Setsuko is a laid-back girl that enjoy spending time playing games in the club room. She has an interest in the occult and asks Yuji Itadori to retrieve a cursed charm they found, but when the cursed spirit attacked, she felt guilty for putting her friend in danger.

Fearsome Womb Arc
At the Occult Research Club's room, the club members where playing a game of Kokkuri, until the student council president comes and informs them that their room is being taken due to lack of activity report. Setsuko tells the clubs theory that the reason for the school's rugby field got closed is due to being haunted, but the student president debunks it, saying it was due to ticks. He then informs that Yuji is not even on the club and the club doesn't have minimum required members. Setsuko and Takeshi then go with Yuji to sort things out with Prof. Takagi, who changed his club activity. After sorting things out with him,, Yuji told Setsuko and Takeshi, that he liked the club and wanted to stay, to which they blushingly agree.

Later that night, Setsuko and Takeshi sneaked into school and while in the Occult Research Club room, they try to unseal the cursed charm they found. As they succeed, they are surprised it was a human-looking finger, but in that moment they got attacked by curses. As they ran, they got separated and when they reunited, Takeshi had a curse attached to his head. When Yuji and Megumi reached them, Setsuko and Takeshi were already unconscious and the curse was attempting to eat them, but Yuji saved them.

On the next day, Setsuko was at the hospital watching over the injured Takeshi and blaming herself for what happened. Yuji then insists that he is to blame for finding the charm and that people capable of healing Takeshi will come tomorrow.

Tokyo No. 1 Colony Arc
Inside one of the Tokyo barriers, Setsuko is woken in the middle of the night by Kenjaku, who offers her a chance to leave the district. Disoriented, she goes along with Kenjaku who thanks her for getting along with his son. She fully awakens outside the barrier alongside Takeshi where they contemplate the relationship of a massive black barrier with occult activity.

Abilities and Powers
As an ordinary human, Setsuko doesn't possess any additional abilities.

Trivia

 * Setsuko's family name contains the kanji for "help, aid" (佐) and "tree" (木).
 * Setsuko ranked 52nd place in the manga's 1st Character Popularity Poll with 106 votes.

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Setsuko Sasaki