Is she the daughter of witch? If she is then who is her mother?
You'll find more info on Emilia's Mother page, though, be ware that it contains spoilers for episodes 42 and 44 so view at your own risk.
Nah, her mom's human
Ah her parents failed to show up to her birth
It's heavily implied Pandora killed them
Fortuna ain't her mother, who was it exactly? The world may never know
What do you think?