I used to be a cannon fodder female supporting character in a suspense novel, but I was summoned by the space maintenance department [CIA] because my best friend violently killed the heroine and the villain, causing the plot line to collapse.
Became a space dispatcher, traveling with his assistant [dudu] in various suspenseful worlds to save innocent supporting characters who died because of the protagonist.
Concept: Supporting characters should not be tools for the success of the protagonist