"They're able to think for themselves clearly." Naminé, for example, was entirely self willed. So heartless were just single-minded monsters. The Nobodies reflected the mind of the Hearless, she guessed? Admittedly, she didn't realize how much of an exception Naminé really was in this regard, but she was still at least correct about the others.

"It's a curious thing either way, gotta say."