Ghosts don't bleed, or eat food. At least most ghosts don't.There were a lot of red flags with the girl, but I definitely did not expect that twist in the end. Looking forward to where the author is gonna take this, since it seems like Miyu isn't just his delusion?
My current theory is she became some sort of ghost to help out her childhood friend who has kinda lost his way. Such a tragedy though that by missing that festival, a lot of shit went wrong in their lives.