Since the two formidable spirit masters had managed to break the array, they had focused entirely on spying on William.
In their hyper-fixation on the "Old Fox" and his revolutionary technique, the two missed the area around the mansion and didn't detect the presence of such a young girl.
The girl had appeared just a couple of hours after William started to try out the final version of his Holy Sword technique.
She couldn't see anything through the array William had casted, and yet, for a reason she couldn't fathom, she felt a weird resonance inside her—one that she couldn't even explain.
It was as if a string inside her soul was being plucked by an invisible hand every time William swung his blade.
