The Goddess at the end of QoA?

[annalibelle.livejournal.com]

 I'm new, so I don't know whether this has already been discussed but...
 So at the end of QoA, Eugenides sacrifices to the gods, but Moira tells him that the gods have no messages for him. Then another goddess speaks to him and shows him the dream about the volcano.
Who is that godess? It can't be Moira because she was just there, and she is "standing between Eugenides and the Great Goddess" so she's not Hephestia. Is she the goddess mentioned in the Eddis short story?
-Thanks,
Annali