Race: Unknown (looks human-ish, green eyes)
Concept: The Lady affects chances, large and small. She never comes when called, but is often around when least expected. Oh, and the does not play favorites.
The Lady has been around for a long time. She's seen, and affected, it all, often in the smallest ways. She makes butterflies flapping their wings look linear and deterministic. Everyone knows her, and everyone courts her. What everyone doesn't know is that she takes a direct interest when it takes her fancy. And so she now travels among the people, enjoying the life as it is lived among the mortal plane. She likes good food, and good entertainment, even if she has to provide it herself.
EDIT: In a fight, she will do her best to make unhappy things happen to her opponents. Preferably from a safe vantage point.