There is no point at all to the cruelty and suffering in the story if you liked the story you need to start visiting a mental professional before you harm friends or family.
It makes me sad that the Doll finds it impossible to understand that the little girl didn't abandon her. Honestly I was wondering if the Nina had ended up with Kiyo's soul if perhaps Kiyo's ashes had been stored in Nina's body.
Honestly this would be a "good" horror movie. The sad thing is there are people out there that are this messed up in the head that they would/have done things like this. Good plot and art work.
I don't usually like horror but this has a good slow build up to it. Should be interesting to see if the next chapter works or if it can keep building with out losing the balance.
Do you mind explaining the supernatural part of the story the part with the shrine has me confused.