User blog comment:B1littlehero/Speculation of the Origin of Species/@comment-4452849-20140612235154/@comment-160529-20140613014838

We know for a fact one group is works and lives together with the Reef awoken, who seem to be on... at leat speaking terms... with the forces of the city.

I think that the Vex are definitely more reasonably than the hive... I feel like the Vex are more annoyed by the other races than anything else, I feel like they have entirely different goals... Rebuilt Vex units could probably be at peace with humanity though, salvaged and altered...

That is what I think is up with the Vex that were working with the fallen in the one video.