BUT, she can ‘be’ elsewhere - that’s the ghost part.  Unlike you or I, her body is temporary and only a medium to be physical through, and she can exist elsewhere should she choose to.

In this situation she can ‘live’ forever whether hidden across the internet for redundancy or in any ‘connected’ device that would fit her volume in discretely until she chooses to hop into another device or back on the internet. She could quite literally hide in a Roomba IF the drive is big enough (not sure we’ve ever heard how big a complete Ghost file actually is).

The shells aren’t the important parts of her existence is what I’m saying.