Subject is an entirely different form of life, completely inapplicable to any previously known categories. Neither Human nor Gear in origin, his DNA structure bears no relation at all to anything currently on record. It is unknown how many other beings like this one are in existence, and whether or not they have any relation to the human race. Besides his name (Slayer), all we know about the man is that he founded the Assassins' Guild. His battle abilities and his combat style have no known method of suppression, making him an unmatched threat of the highest caliber.