"Yes," Rose offered Lydia a hand, purely out of habit, even though usually the only person she ran alongside like that was the Doctor, but now that she wasn't a ghost herself...

"Both. I'm field agent Bad Wolf. Spent the last two years traveling as a ghost. And yeah, it was definitely lonely. Even my two best friends couldn't see me, or hear me. I couldn't get their attention even yelling myself hoarse and wavin' my hands like crazy. I thought I was pretty skilled on this whole corruption and darkness thing, but my universe doesn't have magic, I'm not sayin' it's impossible, but I can't really get my brain to click with it just yet, yeah? Have you ever met ghosts before, or is it just some lifelong dream? Not many who don't want to run away from ghosts, but to them instead."