Our TG Caption

In your panic you accidentally end up using the device to swap "bodies" with the ghost girl.
Your body changes, taking on a form reminiscent of that of the ghost who tried to posses you seconds earlier. However now you are the ghost possessing her, not only that but you can feel that the device has become an integral part of your "true" spectral self.

You can clearly see into her mind and you can tell that thanks to the power of the device, reality will alter to reflect any changes you inflict upon your host.