Darkness (or Tenebrae, as he prefers to call himself), is an ageless demon from the darkest parts of the Abyss, literally living only to wreak havoc and destruction.
Against his will, he was summoned and bound by the accomplished dark mage Ludwig Schroedinger, and set loose on the Russians during WW2, causing massive casualties in Leningrad. He escaped via a loophole in his bindings, but could not find Ludwig Schroedinger, and so nursed his grievances alone.
His hatred returning, he was involved in the Dreamlands invasion of 2006, reaping a great tally among the forces of the National Guard and the SDI before fleeing as the tide turned against the horde of interdimensional monstrosities. He vanished again, and is currently keeping a low profile, hiding and waiting.
Darkness has terrible powers, most notably the ability to change shape. He is also super-durable, able to survive major artillery barrages, and super-strong, enough to throw tanks with difficulty and people like rag-dolls. Shadow dances to his every whim, making blasts of tangible shadow that can suck the life from his foes, and destroy things by subjecting them to the full wrath of entropy.
Humans and animals he can possess, his mind hollowing out their souls and turning their bodies into empty shells, meat-puppets that rapidly die when denied access to the animating force of his power. He can make illusions, controlling people's senses utterly, making them puppets dancing to his tune.
Dark magic is his element, and the dark light that shines forth from his eyes makes this all too clear. He summons monstrosities as great in number as they are horrific - skeleton-legions of the long dead, animated by his dark powers, three-headed hellhounds, eyes blazing with infernal red light, hell-steeds with long fangs, unnatural speed, blazing red eyes and the power to fly.
Darkness usually resembles a fairly non-descript human, wearing a long black duster. But his true form is revealed when he attacks, revealing him to be a dark angel, beautiful and terrible. Black hair flows down, floating in a non-existent wind, dark light explodes outward from his eyes, as he flies on six thin black wings, wielding a flaming sword that burns with black fire, while he wears spiked armour and a cape that flies in a non-existent wind. Upon his brow is a crown with seven black diamonds that shine like stars, terrible and wonderful at the same time.
Personality-wise, Darkness is malicious and cruel, often disposing of minions that displease or fail him in some way, while caring little for the devastation that he unleashes, laughing with manic glee as he cuts down his enemies. He seem to enjoy the horrors that he causes, and his complete madness is unmistakeable.
