Ana Bray was a Guardian. The Exo Stranger has no Ghost and by her own admission "was not forged in light," so she cannot be Ana Bray. Originally when The Crow (now Uldren Sov, Queen's Brother, RIP) was a part of the Traveler = Bad storyline , the Exo Stranger, a rogue Speaker, and two more Ghost-less guardians were his followers. References to the Traveler = Bad like the Triniity / Star Cult stayed in the game but other references were kinda forgotten. The Exo Stranger has a seething hatred for the Vex and possesses weapons that do not exist in this time lane, so she is a chronological anomaly not unlike the members of Kabr's fireteam who were locked out of our reality. I personally think that she is the Exo incarnation of Dr. Maya Sundaresh, the Ishtar Collective scholar that Cayde fell in love with when he was human.. She seems the likely candidate since she has the connection to the true nature of the Vex via the Ishtar Collective archives angle as well as being familiar with the Exo consciousness transcendence. My other guess at her identity is that she is as of yet unnamed member of Kabr's fireteam and that the "others" she speaks to on Venus during the first Vex encounter are the other members of Kabr's fireteam. Somehow they are alive and operating in and out of temporal flux as to hide their presence from Guardians and Vex alike. The glaring hole in that theory being that if she were a member of Kabr's original fireteam, she would indeed be a Guardian and the whole "not forged in light" comment throws a monkey wrench in that argument. Even if her ghost was dead, saying that she was "not forged in light" would be an outright lie.

[i]I[/i] know the exo strangers name [spoiler]but i dont have time to explain[/spoiler]

Susan?