Jiro Mochizuki

Jiro from Black Blood Brothers. A vampire who comes from a special bloodline (the blood of the sage), his yonger brother being the only one that shares that with him. His weaknesses are sunlight and water. He has been chosen to return the Sage's blood from himself into her reborn body. Coincedentally, the body is of his little brother Kotaru. Once this is done, he says he will no longer be there. Whether that means death or not is uncertain.