Nadia was just getting herself, um, comfortable for the spell (wait, 'ready', the word fitting is ready, so scratch that), getting ready when Noel casted the spell. Seemly she wasn't completely ready, because when the spell came, a sudden panic that came with duelling and reflect to avoid the spell kicked in.

It was seconds before she would move away that she a rational part of her mind went 'wait, you are not suppossed to move' and in the hesitation, she covered herself with her arms quite pathetically and without point as the spell zoomed to her and evetually, of course, hit, making it all black to Nadia...