To get straight to the point, Kugisaki Nobara died. The scene of her death is described from episodes 125 to 126 in the Jujutsu Kaisen manga.
The author Akutami Gege showed up on a Japanese TV program and told about Nobara’s death. According to him, Nobara has just died, but her body is “stopped” by Nitta Arata.
Nitta’s cursed technique can fix the condition of something with his cursed energy. If he used this ability on the wound, the bleeding stops and it never gets worse. But that’s not the same as it’s healed. His technique simply stops the condition.
Nobara’s body is dead, but its condition is kept fresh in a way.
Who killed her?
It’s Mahito. His attack Muitenpen (Idle Transfiguration) blowed away left half of her face.
Is she going to revive?
I hope so!!!! Let’s think about the possibility.
In Jujutsu Kaisen world, there’s a Hanten Jutsushiki (reverse cursed technique) that works just like healing magic. But the damage of Muitenpen can’t be cured by the Hanten Jutsushiki. So it’s unlikely that Ieiri Shoco can treat her.
Then Nobara will be really gone and leave the stage of Jujutsu Kaisen?
I don’t think so. One reason is Nitta. If she simply died, there’s no need to describe his character and treatment. Her body is maintained and that must have meaning. I think something will happen to her. But if she could revive, she might not be a normal human due to the effect of Mahito’s cursed technique.