The Road to Hell
The Lady of Pain is the protector of the city of Sigil. She is also known as Her Serenity, for the permanently vacant expression on her face, The Bladed Queen, or simply The Lady. The Lady is sometimes seen as a floating, robed woman with a mantle of blades around her expressionless face. No one knows how she came to be or what her true purpose is. 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 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). Rumor has it that even greater deities have fallen before the Lady. The vast majority of Sigil’s denizens dread her apparitions, and avoid mentioning her name aloud for fear of drawing her attention.
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 worshiped as a goddess, and anyone brave (or careless) enough to worship her has met a grisly demise in the shadow of her blades.