Name: He's known as Onikage (demon shadow), or occasionally Tensei Shinigami (Divine God of Death)
Age: Unknown
Gender: Unknown, presumed to be male, although in Japanese he's referred to in the uncertain tense, meaning most of his colleagues don't know either.
Vampire: Unknown
Tenshi no Segi (Justice of Angels) Onikage uses a full set of Projector Armor, which allows him to project almost any image onto his armor. This means his armor will constantly change colour to match the environment, allowing him to become nearly invisible. Underneath this he wears a layer of Dragonskin, which protects him if he's ever seen. His feet and hands are laced with nanotube velcro, capable of latching onto any surface and strong enough to hold a man twice his weight. Effectively he can walk on walls like spiderman, and become nearly invisible.
Furthermore, the helmet includes a special visor with a heads-up display, which until recently was limited to the realms of science fiction. Furthermore, it can see radiation waves, infrared, ultraviolet, and contains nightvision, all of which serves to allow him to operate better under multiple circumstances. The helmet completely obscures his face, hiding it from sight, and can hack into comm links with ease using a built-in supercomputer that runs on blood. It also contains a gas mask, and special filters which act as gills and can be removed or added, allowing him to breathe even underwater.
Akuma no Segi (Justice of the Demon): A massive gun, originally intended for taking down tanks but modified to take down Oldbloods. This weapon uses railgun technology to fire off brick-sized bullets at Mach 2 without making hardly a noise, besides the sonic boom. These massive bullets are more than just solid steel, however, as they themselves contain a drillhead, allowing them to drill through heavy tank armor. Furthermore, each bullet contains a remote activated bomb. Against tanks, the bullet will destroy them from the inside, oldbloods are reduced to scrap meat.
Kazekiri (wind slicer): The mysterious sword wielded by the legendary assassin is said to be invisible, and capable of slicing through any material. In truth, it's a trimolecular katana. While it is not invisible, it's edge is so thin that when aimed at a target, the blade becomes impossible to see, and thus it's length is impossible to gauge. Furthermore, the fact that the edge is only 3 molecules thick makes the blade incredibly sharp, allowing it to slice through armored steel like butter. This technology surpasses even nanotube ceramics by far in sharpness, although the same technique is used to make it sturdy.
Shinigami no Mite (Eyes of the Death God): Onikage carries with him several drones that can be programmed to observe certain areas with cameras. Although unarmed, these drones use the same projector armor technology as Onikage himself, allowing them to become nearly invisible whenever they wish to. They're carried aloft by twin propellors, modified to make as little noise as possible. However, when noise is an issue, Onikage can also simply place tiny camouflaged cameras himself.
Ningen no Segi (Justice of Humans): Integrated into his body armor is a special set of robotic limbs, attached to his own. These are linked to his neural network, allowing him to use his throughs to control his robotic exoskeleton. This exoskeleton is far more powerful than any human limb, or even most vampire limbs, giving him enormous strength when this becomes necessary. Normally, however, he prefers to kill his opponents before it can develop into a full-on duel, although there are many legends of him defeating legendary vampires in one on one sword fights. Many of them are more than just legends.
Ao Chisio (blue blood): allegedly, any vampires that dares to drink the blood of this assassin dies. This is well documented, and is explained with the idea that Onikage's blood is laced with a special neurotoxin that he himself has become immune to. It is well registered that every attempt to poison the assassin has failed, through gas, injection, and by lacing hs foods with poison.
Appearance:
Personality: The master assassin doesn't speak, he's never seen eating or sleeping. Very little is known of him besides his skill and his exploits. However, when Japan offered his service to the SOLDIER presence in America, the message included a long list of Oldblood vampires known to be killed by the Demon Shadow, Onikage. Few know where he came from, and rumors about this man are abound. However, what is known is that he will resort to any means necessary to take down his target, and is quite capable of killing anyone in his way. Now, his target is Magnus.