she's an ANGEL
Or a cute little demon 
Actually shes a Phoenix XD
Really?? Like a Phoenix spirit with a human form? Or a metaphorical phoenix? Or is she a bird incognito? o.O
Lol no no no(but close) In my Story/Series, shes an alien and her alien race are Phoenix-like beings(not like the actual Mythical Phoenix bird but they have more of the bird/Fire features)