User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-2127388-20120314232229/@comment-2127388-20120315080212

Liara? I dont know how it goes with asari-human, who carries the kids, or if it can be both species. Depending on this it will determine it :)

The battle with Harbinger, maybe it could be also a final battle in his mind, like Shepard was in Geth con... in their collective mind :D Or not, but definitely Harbinger could be the final boss, as he is "leader of Reapers".