Kaiba watches the penguin with some mild amusement before turning back to the subject at hand. There's something almost...regretful in his expression.

"Mm. I don't know how much you know about Yugi Mutou, but there were two entities in that body. Yugi, and the spirit of an ancient pharaoh, Atem. Atem passed to the afterlife a while after you stopped Gozaburo...yet he's here, alive and with his own body."

He folded his hands with a sigh. "I've used this opportunity to resolve unfinished business with him, and..."

This is the awkward part. He pinches the bridge of his nose. "I'd like to do the same for you, if you're amenable. I'm aware our relationship is...strained, but since we're stuck with each other for a while longer..."