Eliot/Ian
She doesn't actually seem to hate you, or even to dislike you all that much. That's surely a good thing.
I've not had the 'stolen away by fairies and aged in advance' thing, but I've definitely had a few of my kids go years without me in their lives. The fact that she's open to staying here with you, or even talking to you, is a pretty decent sign.
Are you wanting a chance to parent her for your own sake, or entirely for hers?