If anyone knows what that thing is that she's holding in her hand, please add the tag. Thank you.

It's a jitte, used by feudal-era cops to (maybe) break swords.

windward said:
It's a jitte, used by feudal-era cops to (maybe) break swords.

I learned something new today. Thank you.

Break, no. Catch without touching, yes.

"A popular misconception is that the tine is used to catch a sword. It could possibly be used for this purpose, but the tine's proximity to the hand would make it rather dangerous. When faced with a swordsman, a more likely use for the tine would be to capture and arrest the blade having evaded it."

twas used to twist the sword out of the hand...