In this world, those wouldn't be the spirits of the dead. They would be the spirits of the unborn. They can fill the roles of stories if the living believe enough. So if enough people believe a house is haunted, a spirit can exist as the 'ghost' that they expect to see.
[Yuuto catches himself going overboard with information, so dials back to the original question:] ... The answer to your question being, the spirits that can hurt you are the ones who you give the power to hurt you.
[Or the ones that other give the power to cause harm.
But Yuuto is being mindful not to spread that idea around casually. Sensing that Inaba is smart enough to draw lines if he lays down the dots, he instead speaks vaguely:]
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In this world, those wouldn't be the spirits of the dead. They would be the spirits of the unborn. They can fill the roles of stories if the living believe enough. So if enough people believe a house is haunted, a spirit can exist as the 'ghost' that they expect to see.
[Yuuto catches himself going overboard with information, so dials back to the original question:] ... The answer to your question being, the spirits that can hurt you are the ones who you give the power to hurt you.
[Or the ones that other give the power to cause harm.
But Yuuto is being mindful not to spread that idea around casually. Sensing that Inaba is smart enough to draw lines if he lays down the dots, he instead speaks vaguely:]
That's why I don't believe they'll hurt you.