Either this is miscellaneous or something bigger.

Maybe Daphna was a member of one of those religious sects on Mount Targon? Maybe she's some random throwaway side character that we'll never hear about again? Only rito knows.

Everyone was talking about before Zoe was released, untill it got was revealed that "Daphna the Dreamer" had nothing to do with the twilight champion

Eh, I think it would be cool if Riot took this and made her a champion. I don't think she shuld have a star-based kit, as Zoe, Sol, and Soraka all have power from them though... I wonder what role she should be?