"Send the Dead...back to Death...Send the Dead...Back to Death..."

- Sayuri threatens Mei at the Inn.

Sayuri Kakinuma (柿沼 小百合, Kakinuma Sayuri) is a student of 9th Grade Class 3 in 1998, at Yomiyama North Middle School.

Sayuri is a pale girl of below average height. She has dark blue hair tied with two braids, light blue eyes, and wears round aquamarine green frame glasses. She was seen wearing only the standard female school uniform.

Sayuri was shown as a quiet, shy, and somewhat mature girl, who was seen enjoying reading more than chatting or being in the company of other people; a taste that she shares with Yukito Tsujii, so it could be said that he was close to her.

During the events that occurred on the school trip, Sayuri was willing to assassinate Mei Misaki in order to supposedly stop the calamity, but then she decided to forget that and tried to save her own life.

Sayuri is usually seen reading by herself (as seen in "Rough Sketch"), as well as going to the library. She was present during Mr. Kubodera's suicide, an event which was probably traumatic enough for her to miss a few days of school, as she didn't appear for several episodes.

She was also seen in Kōichi Sakakibara's nightmare, sitting on a chair, looking at him.

Sayuri is later seen on the class trip, not smiling in the group photo. In "Makeup", she heard Takako Sugiura's broadcast, and along with Matsuko Arita tried to confront Kōichi, though they were unable to prevent him and Mei from escaping. In "Stand By Oneself", Sayuri escaped from the building after being hit by a falling chandelier and was later seen outside with San Watanabe, Matsuko Arita, and Yukito Tsuji. This would be her last shown appearance as she isn't part of the group that visits Manabu Maejima in the hospital. She and her family probably left the city.