Compared to most shonen, Jujutsu Kaisen has an astronomically high death toll. No matter how fan-beloved or how important they may seem to the story, no character is safe from Gege Akutami's pen. The series goes to great lengths to illustrate how dangerous the lives of its jujutsu sorcerers and curse users are, showing them no mercy in situations that a simple hospital trip in other titles might have solved.
Source：https://www.cbr.com/jjk-every-character-death-when-they-happened/
