He sighed. "Nature of the portal, Slayer. Can't get from there to here with a soul. Can't get from here to there without one. Way of the worlds."
Does that mean that Buffy has lost her soul to get through the portal? It would explain a lot if that's true. But how does she get a soul for the trip back? And by the time Spike gets back, will he miss this new soul?
I have to say this is why I love this story. Your original vision is endlessly fascinating. I love your work.