Who are our Guardians? (Destiny)

by Grizzlei , Pacific Cloud Zone, Earth, Tuesday, October 18, 2016, 15:05 (3050 days ago)

So I started my first new Guardian since launch and have already concocted up my own head canon about her, an Exo Titan. That being said, as well as with her Awoken Hunter sister, I'm confused to who exactly our Guardians are in firmly established canon.

Our Ghost wandered the Cosmodrome of Old Russia in search of a spark of light and just outside the wall, in the rusting carnage of a futuristic traffic jam, they found us. So who are we? Our Guardians obviously have a knack for the Light to a greater extent than most others subject to the whims of the Darkness. What I'm wondering is, are we long deceased Guardians who were unable to be revived by a long lost, likely destroyed old Ghost of our own? Or were we just some ordinary, defenseless person trying to escape the horrors which followed in the Traveler's wake?