"The Shadow of Yuloth", Shadar-kai elf Rogue (D&D)

The Shadow of Yuloth is how they call the one who, long ago, was perhaps the most dreaded assassin in the Forgotten Realms. Born a Shadar-kai elf, her soul is now trapped between the Material Plane and the Shadowfell, since her deity, the Raven Queen, intervened to save her from death.