Immortal Innocence: D. Gray Man
After watching from the shadows, looking after her younger brother Allen Walker, his elder sister by 10 yrs. finally decides to let him know that she is still alive. In fact Allen's family has been looking for him ever since he had been kicked out of their home by the evil woman who believed she had been right about him, calling him a devil. Little did she know that it was the sister she had to look out for. Cheryl Night is Allen's elder sister by blood, and she has finally found him. Unknown to him she was also a parasitic type user of innocence, and she was a unique person for she couldn't die no matter what. Having two innocence inside is impossible, but not for her, as I said she was unique.
A/N ok so there is romance but it is not with any excorcists yet.