What are the supernatural elements in
Higurashi no Naku Koro ni?
Let's get rid of these first so we can see what is doable and what cannot be doable in this story.
- Rika can reboot her life when she dies.
- She somehow retains the memories of her previous lives except for the details on who or what is killing her everytime. And since she is already dead after she is watanagashi'ed, she does not know about the Great Hinamizawa Disaster either.
- Miracles sometimes will happen where some of the other bukatsu members will recall their memories from another world for their own self-awareness.
That's about it. There's nothing else. No supernatual ESP powers to teleport, move objects, kill people with thoughts, UFOs and aliens, and what not.
With that set aside, we can go on to ask the correct questions:
1. Who watanagashi'ed Rika?
2. Who or what causes the Great Hinamizawa Disaster, and why?