Luciana was a sorcerer mentioned by Nefarian Serpine.
Dying of the Light
In The Dying of the Light, Nefarian Serpine mentions Luciana as one of the "mistakes" he had made after replacing China Sorrows as the leader of the Resistance - implying he killed her. (Flaring, Shakra, Ashione, Rosella, Kallista, and Rapture are also mentioned "mistakes".)
She is based on an English fan of the books.