The possesser ghost's name was Artaria, and she was itching to get done with this mission and get back to possessing the body of that previous woman, the blonde was quite looker, so it would be a shame not to take advantage of that.
Using a thin rectangular item that the livings of this realm called a keycard, she gained access to a room that she could only know the existence of by digging through the guard's memories, otherwise, it was far from obvious where that thing was hidden.
Especially when the bunker was filled with livings, their life force clouded her vision and senses…
She had gone into this blindly, having simply been told the goal of her mission in broad terms, but she had not had an actual, clear plan from the get-go, she was making it up on the fly by using the memories of her host.
Artaria made sure that the way in was shut before pressing onward, eventually arriving into a room full of buttons and a bunch of devices.
