Keeping his stance deliberately casual, as relaxed as he could make it. He honestly didn't see a threat in this version of Sephiroth. Yet.

That didn't mean that, depending on how things went, it couldn't become dangerous. The conversation was already a potential mine-field, and Vincent hated navigating those socially. Part of why he was rather taciturn in most situations.

"It was not this world. But again, you aren't him." A pause, and red eyes flicked to meet green. Steady, calm, careful as he held the other's gaze. "I suspect I'm from further on in the timeline than you." Another beat, before dipping his head in a brief nod as he maintained eye contact. "Vincent Valentine."