[Knowing that he wasn't just crazy was a relief. Strange Trench Phenomena were something he could handle-- especially if he was working with someone that didn't need a full recap of everything that had happened before they entered the Waking World.]

...Probably,

[Oscar replied, glancing back to make sure Shiro was following. The built-in flashlight was fascinating. But, they could talk details about that later.]

I've heard that Ghosts don't see the world the same as we do, but the one that they knew when they were alive. She's probably trying to go home. Or, take us somewhere that she liked to go.