Angel of Death
When Ryou was a child, his mother would pull him onto her lap and lovingly comb his hair. She would tell him his hair was fluffy as cotton, and white like heaven's silky fluttering wings. He was her precious angel.
Ryou had always agreed readily with her. But then, one day, she and his sister died in a horrific car crash - it left Ryou wondering what sort of angel he was, so utterly useless to protect the precious women in his life.
Perhaps his mother had been wrong, claiming him to be an angel of heaven. He was an angel of death and misery, if his inability to save them was anything to go by. And then he met the malevolent Bakura, the soul he'd reincarnated from, and his theory was substantially strengthened.