Part of Kuja realizes that Zidane isn't foolish at all, quite the contrary, but she's not about to admit that. It is a foolish act to risk your life for someone who might as well already be dead, that is certain, so in that, he is undeniably a fool.

She watches the woman shambling. So slow! Kuja has little patience for dawdling, and she leaves the ground for the air and glides along beside the woman--and then ahead of her.

The clothes should be easy enough to find for a magician of her might, and so they are. She rises skyward until she has a fine view of all the ground below, and as she thought, it takes but a moment to spot the garments from above. She is not about to go and fetch them, so she levitates them instead and floats them over to the gradually approaching Zinc.