^ I don't know if it will be a leading female role as the details are still quite far and few between (only first weeks of filming under way) but given the fact Mariko is Logan's (that would be Wolverine's real name) love and bride-to-be, it sure should be an important role nevertheless. There's also another big role in the original comic for a Japanese girl, Yukio, a cold-blooded assassin who falls for Logan, and in the movie she's played by a fellow model Rila Fukushima.
I personally think Tao will make a geat actress. In a sense, a good model is also an actress and Tao is fantastic model at that. A shy and humble Tao turns into everything she wants to be or is needed to be in front of the camera. Also, she has been excellent in portraying emotions in recent Emporio Armani campaign videos, especially the black & white for the last spring. Not only is she beautiful in it but she has a soul behind her eyes.