"So far as his cells are concerned, an' so far as all of ShinRa's monster-huntin' equipment ever saw it, yeah, you're wrong, yo. But mentally, nah, he's human. He's a good kid, even."

The kind that made Reno wrinkle his nose and want to kick him in the shin for being so damn optimistic all of the time.

"There's other shit, too. They're immune to certain scientific procedures, they're more prone to bein' genetically manipulated in other ways. That kinda thing. If you're worryin' about SOLDIER boy so far as that goes, there ain't no point. You'll be happy to know that Zack gets to stay Zack."

In spite of Hojo's best efforts.