Hii I was trying to write chapter 17 of my story wildflowers, and an idea came from me. Go read that chapter now if you have not yet, and you kind of need to read the rest of the story before we continue with this so go do that now.
I am going to talk about death. specifically what happens in the Harry Potter universe when people die. as we know, harry does technically die, fight with me, he's dead. but he goes to King's Cross station and talks to Dumbledore. Now, one of the few things that JK did that I like in her books. and I thought, YES AND!! so my theory is that everyone goes to the point in their life where they faced a crossroads of a turning point, or more specifically the place that this happened. For Harry, this means king's cross, and for Ginny, I think it means the hill where they take the portkey to the quidditch world cup.
and then they meet their mentor, or the person that they most need to see at that moment. Harry sees Dumbledore because he needs answers, Ginny sees luna because she needs comfort. there, you can have a conversation with that person. I
Then things get confusing. Dumbledore says that if harry wants to not come back he could get on a train and leave forever. I think that Luna would tell Ginny the same thing but with a portkey. This place that they are in, different for every person, is the place where they make their choice. when people die they get to choose whether to go back to life or go on. but neither harry nor ginny are ghosts when they come back so I think there is another choice that you get to make after you decide that you are really dead. and then if you go back you are a ghost. This is all super complicated but I also really like this theory. let me know if you want me to speculate about other death things!