User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-72.129.122.209-20140110071401

Ok this is just my opinion but it could be gray's father who saved him from deliora who attacked his home town, it's possible that he begged for mercy for gray to live at the cost of his own soul and the look similarities name coincidence and the grave might have been grays mom and he is a demon but prefers his human form to remind him of who he was and probably tried to fight the demon which explains his scares and for a bad guy he seems to care for other people and has a hatred for demons and he refused to harm a human messenger claiming he only eats demon souls.