Monster Den Orb
It felt like everything was chaotic, but weirdly enough they were all synchronised and linked together.
She thought that someone must have been orchestrating the entire battle for William's side. Or else how come these masters moved in such perfect timing and fulfilled such unbelievable retaliation.
If this happened on the outer world, then she'd think these masters were experienced enough, lived through hellish battles to develop such brilliant judgement. But she overlooked the masters of this world, feeling they were as weak as ants were.
In the middle of all this, she was looking constantly using her spirit sense for William. She would have found him fast if she knew the general area he was in. But since the entire place was in chaos, middling her masters with William's, it was hard for her to find him fast enough.
On top of that, she didn't know how he used to fight, or else she'd have spotted him the moment he used his signature moves.