He could be reading too much into it. He didn't know Zack's moods and behavior patterns, not like he might have over time on their own world. Apprehension chews at him anyway, more than willing to assume the worst and run with it.

Reality is worse than his imagination supplies.

"...Your demeanor changed, when I mentioned Genesis." If Zack chooses not to answer, there's not much he can do about it. "Much as it had when Angeal was."

And Angeal's dead, apparently. Will die. What of Genesis? Was there time to do anything, were he to find a way back right now? "I find myself wondering as to their fates."

It sounds so clinical, like there's no attachment at all.