|Height||5'3 (158 cm)|
She has brown, shoulder-length hair and brown eyes. Sachiko wears the school standard female uniform.
She seems a friendly and sociable person, as she is shown with different girls from their classroom like Yumi, Matsuko and Megumi. Judging her actions and appearance she looks an humble and innocent person she also looks emotional and terrified when her teacher kills himself and it takes a hard effect on her.
Sachiko wasn't a fixture of class 3-3 and didn't interact very often with either Kouichi or Izumi's groups.
Sachiko was present when Mr. Kubodera brought a mysterious black bag to class one day ( "Sphere Joint"). As the person in front of her was dead, Sachiko was close enough for blood to splatter all over her when he violently killed himself and was among the students who fled in terror following this extremely traumatic occurrence.
Sachiko opted not to attend the class trip, and it's likely her family simply fled the city after transferring her out of the school, as she was not seen at the hospital with the other survivors. Nevertheless, there is no reason to believe she died; it's highly likely, if they did flee, the Nakajimas survived the calamity of '98.
- She is ranked A in Another character ranking.
- Her home address is 3-4 Seitencho Yomiyama City.
- Her first name, Sachiko, means "child of happiness."
- Her last name, Nakajima, means "God's gift."