The prophetess

Beatrice Moon was the initial inspiration for the prophetess character.

Miriam
Exodus 15:20-21

20 Then Miriam the prophetess, Aaron's sister, took a tambourine in her hand, and all the women followed her, with tambourines and dancing. 21 Miriam sang to them: "Sing to the LORD, for he is highly exalted. The horse and its rider he has hurled into the sea."

Possible tie in to Atlantis mythology?  Hurled into the sea?

Exodus 2:  Miriam watches as Pharaoh's daughter discovers Moses, and suggests a Hebrew nurse.