Are we to assume that all the 13 million people living on the Citadel died at the end of Mass Effect 3? From what I understand, the Illusive Man snuck onto the Citadel somehow, and called the Reapers over. Considering that they wouldn't be able to defend against even one Reaper without Shepard shutting its shields off, seems to me that the Reapers would have just torn through the Citadel defenses like tissue paper, then swarmed the Citadel with ground troops and blasted the ships of anyone trying to run away.
And if by any chance anyone on the Citadel managed to hide and survive, they'd die in the ending explosion... or if they didn't get killed in that explosion they'd get sucked out into space when the technology that holds the atmosphere in place shuts down. So all those people on the Citadel that you helped out, the grieving widows, the refugees, everyone at the memorial wall, all of C-Sec, all the ambassadors, captain Bailey... yep, they're all Reaper chow.
And if by any chance anyone on the Citadel managed to hide and survive, they'd die in the ending explosion... or if they didn't get killed in that explosion they'd get sucked out into space when the technology that holds the atmosphere in place shuts down. So all those people on the Citadel that you helped out, the grieving widows, the refugees, everyone at the memorial wall, all of C-Sec, all the ambassadors, captain Bailey... yep, they're all Reaper chow.