Lux

Lux, as she is affectionately known, is a minor lightbringer who has come into being under mysterious circumstances. Normally lightbringers accompany greater beings (usually a demi-god like an angel, or a czylph) to help guide the way for souls to their sanctuaries, summon forth spirits or followers, or literally to bring light to the surroundings of greater beings. Summoned forth during a ritual gone wrong, far from where it was, Lux now wanders the realm seeking the person who summoned her forth, as well as avoiding being captured by adventurers.

(Lux's background can apply for both a fantasy or modern setting.)