Maescia is the daughter of Jael and Faba. She was taken by the Jackal Mage when he went through Media searching for witches. 

She has the dark hair and light eyes that run on the maternal side of their family. 

She’s imprisoned with Iya, a Djinn, but is freed when Jael finds them.

The wards prevent the girls from leaving the mage’s territory, and rather than be taken prisoner again, each of them kills the other. 

Iya grants Jael‘s wish for Maescia to stay with him by putting her magic into the medallions on his scimitars.