Sephiroth doesn't know this man to be able to identify which parts of his behavior are out-of-character for him. The way he licks his lips, the almost-smile--they could be nothing more than nervous tics. An unease at being approached by a stranger after being injured.

But he does raise his eyebrows at the explanation, once he catches sight of the wound. That kind of deep bite mark pattern, just from something falling on him? He wonders why someone would lie about it.

"Yes. That certainly would be an impressive coincidence," he says skeptically, watching the man lick his fingers. That behavior does seem a little abnormal. "Has your blood always been that color?"