Ten wonders how many more of their abilities are 'turned on' in a book vs the library.
"Oh and you're more terrifying?" As Ten eyes around at the swordsman and the few bows - unblinking.

They called his bluff. Good thing Ten had a backup idea.

"Warned you."

"Cover your ears. NOW! Don't ask just do it!"

Which switches the sonic to send out a high pitch noise and leaves Four's back to quickly rotate in a circle to hit all of them.