I considered that as well. But she seems to have some sort of free will. Magiaconatus "told" her that she can become the princeps mage if she proves to it that humans are unsuitable for this, as far as I understand. So she seems to be somehow separate from Magiaconatus, it's not that she's directly controlled by it (she might still be controlled indirectly). Otherwise, she would be more similar to Borg.
So I'm still not really sure what kind of creature she really is. What do you think?