Nintendo of America has posted the official box-art for Tecmo Koei and Nintendo’s Hyrule Warriors for Wii U. What’s interesting about the box-art is that it shows off a new character that has yet to be announced. There’s no clue as to who she might be, but I’m sure we will find out in due time.

http://mynintendonews.com/2014/06/14/heres-a-closer-look-at-the-hyrule-warriors-box-art/#comments

I've been wandering this as well, but judging the fact she's wielding a floating book and that she seems to be supporting link and Zelda I’d say she’s a new mage protagonist of some sort.

There's an eyeball on the book. Maybe she's connected to Vaati somehow?

Maybe a stretch...

That's obviously Lu Bu.

Next Nintendo Direct we will discover that's not a girl, just a boobed Vaati

Given these past weeks, why do you assume that's a girl?

It's another character with a lot of personality, that's obvious.

Nice boxart...

It's Cia before she turned evil.

I'm not sure. Hope we'll find out in a Nintendo Direct!