The fourth character trailer for Samurai Shodown introduces Shiki.
Here is an overview of Shiki, via Athlon Games:
Originally debuting in Samurai Shodown 64, Shiki is a mysterious woman with seemingly no past, having awoken on Mt. Osore with no memory of her origins. Forgetting everything but her name, and owning no proof of her identity, she picked up two swords found at the base of the mountain and embarked on her journey. With her unconventional attacks and looks, no swordsman stands a chance against her.
Watch the trailer below.