So thought about the nine as being a little bit of everything we know in the destiny universe One kell who abandoned his house One cabal commander who left his fleet One vex axis mind that went rogue One hive servant that turned against the deep An Exo who came from a nearby colony A human left the city on an unknown journey An awoken that left the reef, but not for the city A ghost that learned to survive w/out the traveler And finally, a disciple of Osiris/speaker that left the traveler/Osiris And your theory?