May I .... Let's brainstorm - or at least let me bounce a few ideas off you . - Exo creation occurs a lil' after the research a little before golden age collapse I think . - - deep stone crypt seeded Exo consciousness - is it possible that the stranger is perhaps much more than just an Exo - but something that also isn't - more Vex in nature than guardian ( not forged of light ) - ( Sundaresh brought in a war mind to bring more complexity to a reality to make it more difficult to duplicate to prove if the reality of their experience was a replication of a reality or not ) --- Perhaps before Exos and deep stone crypt there was only a Dr. Frankenstein way to infuse light and life into metal . ( but not forged in or of light like guardians )

I heard that she was a copy of a person attempting to travel between universes in order to find a peaceful one? Because humans can't do it. At least not like exos can.