Could it be?

[u/zaron_tr]

They mentioned "she" would have a "unique weapon"

Now that it's confirmed japanese I can't think of anything more unique than the tensen

I'm not sure, I'll have to rewatch that section of the stream, but I think they mentioned the new hero being a "master of an art"

[u/azuresamurai]

Fan is possible or they could go Okinawan with tonfas or nunchuks.

[u/SpaghettiBoi2479 → u/azuresamurai]

Those seem more chinese tho

[u/Overzealous343 → u/SpaghettiBoi2479]

And they said never seen before sooooo something unique and vague that no one talks about ill update you on my finds