I love the idea of playing a ghost that needs to guide an IA by scaring it!
It was really fun, but also quite difficult at times to lead the IA where I wanted as it didn't seem to react to noise after some time, and didn't know if the exorcist actually found one item even when he was flashlighting the said item. Maybe some feedback for the player might be nice.
Placing a lot of objects to allow the player to make noise was such a clever design choice, really fun experience overall!