Can authors actually stop with these types of tropes. Like i know this is fiction and all but ffs it was already good with just the base story, why did they have to add an annoying af character who doesn't know what the word "No" fucking means. Add to the fact that they added a bit of blackmail...
Considering that she rekt the heroes' party with ease, killing her here is the right way to go. Like what are you going to do if she goes along with them and straight up rampages again in the main country? Who's going to stop her, the heroes? pfft lol
They say a Stand is a manifestation of our souls that reflect our true selves. Therefore the Ghost is our Stand and it embodies what we all want to happen, to eliminate the child.