An assignment for my English class: create a monster.
He had been an angel, once; a being of Truth, and Light. Then Darkness came. Darkness took him, and his brethren. Took them and twisted them, corrupting them beyond recognition. Once he had been the brightest angel in creation; now he is a demon as evil as Darkness itself. Fallen, he took to his new station with as much zeal as he had to his previous one. He is Vetis, the Demon Lord of Corruption and Manipulation.
From dwelling in Light, he fell into the underworld. The Abyss. He is second in power only to the Prince of Darkness, and far surpasses him in sadism and cunning. He spends his time torturing those unlucky enough to fall into the Abyss after their death. Usually, they deserve it. If they don’t, he doesn’t care. The just and the unjust alike can sustain him. Their agony, their sorrow, that is his sustenance.
His human form can appear as anything. He is a shape-shifter, indefinable. He looks into your mind and appears as whatever he needs to appear as to accomplish his goals. Seduction, corruption, deceit, bribery, intimidation… One being, many faces. His true form, his demonic form, is a monstrous being, wreathed in fire. He has the face of death, and his armor carries the imprint of the damned souls he has tortured.