Lady Of Pain
The Lady is sometimes seen as a floating, robed, giant-sized woman with a mantle of blades around her expressionless face. She has never been heard to speak aloud, although she may communicate through her servants, the dabus. She can cause her victims to sprout wounds with a glance, and her shadow can flay the flesh from their bones. The Lady is an entity of inscrutable motives, and often those who cross her path, even if accidentally, are flayed to death or teleported to one of her Mazes (an almost inescapable pocket universe in the Ethereal Plane).
No one knows how the Lady came to be or what her true purpose is. Some suggest she might be a renegade demon lord or Lord of the Nine. Many suspect she has been ruler of Sigil for as long as the city has existed, though she might predate the city’s creation.
Her obvious objective is maintaining the balance within Sigil, by throwing defilers and denizens who anger her into one of her magical mazes. Often, she will only interfere when the very balance and stability of Sigil is threatened. The Lady has the power to control each and every portal in Sigil, opening and barring them at will. The dabus, her servants, maintain the city, forever fixing and patching its streets. For all her power, she apparently refuses to be worshipped as a goddess, and anyone brave (or careless) enough to worship her has met a grisly demise in the shadow of her blades.