She tells exactly who she is.
Someone sent as an agent by Raphael to protect his "investment" on you.
More specifically, in technical terms, she's just a narrative device to put you out of a hopeless situation after you failed your two chances to pass a skill check.
I think it's one of these rare cases where Larian actually achieved their declared goal to "make failure more fun".
Or are you asking if she's supposed to be a pre-existing character in D&D lore?
