[quote=El_Tigre]
I was off the idea that she would be able to manifest herself into physical form. I understand common, average spirits would not have the power to transform into a physical entity. If my spirit character is just a formless energy that some people MIGHT be able to see it'd be terribly uninteresting to role play. Not to mention if she has no physical entity makes her practically invulnerable. If she is nothing but an ethereal form she would have no way of getting hurt unless someone had a special weapon that to connect to the spirit plane.If you don't want to go the whole manifestation into physical form maybe we can go the route of possessing a human vessel that had recently died near the spiritual site where sachi's soul remains?Edit: and sleep is just her way of acting like a normal girl. She doesn't actually sleep, just acts like it.
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Actually Spirits are vulnerable against themself, Demons, and Priestess's. Demons will try to devour the spirit, basically destorying them into so they never exist. So no happy afterlife for them. So if like Mizuki or Kaede tried, rhey could her using their demonic powers or simply eat her. They are more magical beings then physical.

You could have her possess characters or simply be somewhat physical so she is seen. But the group themselves would all be able to see her no matter what as long Mizuki or Hanami is present for reasons remaining disclosed.

I probably should of played a spirit v.v id have fun using spirit powers to mess with the group :p but whichever if you really want her physical I suppose its fine. But that wasnt the idea for them. Except for the actual nature base God born spirits.