Okay, that... assuming Vanitas isn't just exaggerating or outright lying to make her uncomfortable, that's probably one of the most horrifying things she's ever heard.

"Just... constantly? You're always in pain?"

What the hell had that psychotic old monster of a man done? And if Vanitas is actually like that, what are the implications? Do the Heartless constantly hurt as well, the same way as the Nobodies have an emptiness they can' fill?

Kairi's mind reels as she considers what this one detail could mean. It's appalling, to say the least. On the other hand, it would kind of explain a lot.