There's no record of any other Seto Kaiba ever boarding the train, and when...for lack of a better word, 'ghosts' of former passengers appeared, there was no other me. So you're likely from another reality, another timeline. You're not the first double of a passenger to appear.

[ He shrugs. ]

We visited a planet that claimed to be a nexus of the void a while ago. We were told that 'emotion' guides void travel. Ridiculous, right? I tried to use it to send a message back to Mokuba, to humor them...but there's no way to know if it was received.

[ So that was a waste of time. But that last question causes him to lift a brow. And he reaches inside his sweatervest (boy, what a fun disguise this was), where an unfamiliar ring hangs above the photo frame on his locket. He doesn't move to open it yet, not unless proof is needed, but...]

Someone told you about us? Hah...if you'd told me six months ago I wouldn't have believed it either.