They state what type of goddess she is yet that's part of the problem. If they did know what she was goddess of then it would have saved them a lot of time in finding out to be able to communicate with her.
I think she has the blessing of Odin the norse one eyed god of wisdom. It would make sense why it would be on her eye, plus odin's symbol is normally seen as a blank or empty rune since he is the master of runes.