Hiroya Ginkarei/The Masked Man

The Masked Man is the founder and current leader of the elusive Coven. His story began when the Rain Dragon Kouzenkojun was cast down to Soul Society by his own kind, following an act of hubris which they deemed to be far too vulgar and human-like to warrant his continued place amongst them.

Devastated by the loss of his home, humiliated at being forced to spend the rest of his life as one of those mortals he considered to be lesser creatures, the scorned dragon used the last vestiges of his great power to create a scapegoat for his wrongdoings. It was an ancient spell of a nature which even Kouzenkojun could scarcely fathom, and the result was that he created a near-identical replica of himself, who possessed all the traits that the other dragons had so despised. And in this vessel he poured his most negative emotions, his anger, his grief, spite and ambition.

He would remain unsullied, and the Simulacrum would bear responsibility in his stead. But something else occured, the vessel grew concious and individualistic.. moreover, it quickly grew very powerful. Because in his haste, the dragon had mistakenly imbued the simulacra with his own latent draconic powers, powers which waned within him. Soon, it grew more powerful than it's creator and overpowered him once Hiroya realized his folly.

Another, older and wiser dragon might've given pursuit, but despite how it had turned out -- the Simulacrum still remained the perfect scapegoat: and so it was allowed to do as it pleased until it finally assumed a persona of it's own, and gathered like-minded spellcasters to the cause of magical supremacy.