[ Kaiba's demeanor changes in an instant, rigid. He nods stiffly. ]

I don't know how he's here. He isn't with Yugi anymore, I'd know if he was. But he isn't on the roster either.

But it wasn't entirely surprising, because I thought, once...

I hate to believe in ghosts, but maybe the train's haunted.

[ He says that last bit flippantly, aware of how absurd it is. ]