she was originally meant to be Osiris's assistant, if were going to see her again it will be in the first DLC. her line was ''im born from darkness, not from light'' and ''the last place the light touches'' with what happened at the end of the story...and the release cinematic of the sun being blown up didnt happen in-game if she is a time traveller as she says then she could very well be from a time-line where the cabal succeed and everything until now has been nothing but a test, she does say ''many guardians, strong ones have failed where you suceeded'' after the black garden mission. its feasable she can return, and honestly i hope she does, there is also speculation just like cayde was transferred into an Exo Unit that Hawthorne is actually the stranger.