Kasai Sakura

She has odd eyes, and a smile void of nothing but bloodlust and a craving for violence. Suspected to be dead for over a century, but in reality--just trapped in Hueco Mundo, unable to return home. Broken, yet still standing, Kasai Sakura returns to a Soul Society that is both different yet familiar. And she has to find her place in it. As well as deal with a Captain who shares that same bloodlust, and demands to fight her all the time.
She is the Demon of the Soul Society. He is the Kenpachi.
What could possibly go wrong?