I don't think they have any real allegiance to either good or evil, their leaders are both neutral after all. They represent the water sphere, whose god Danalin was never really part of the godswar to begin with, and isn't awake now. I see Hannah as a creation and devotee of the Overlords (who were created by the dreams of Hemah who was created by the dreams of Danalin under the corrupting influence but not control of Hastur and his demons). I think Falamar isn't really a very religious fellow, but he is familiar with the cultists (see his comments about how he has seen men walk on water and doesn't find it as impressive as you'd expect). Overlords doesn't not make sense for him, but I can see Esus or no state religion too. (The leader is current weighted +10 towards OO with no weights to anything else. Hannah is +25 OO, -20 Order, -20 Empyrean. She is a little evil)