Talk:Warframes/@comment-30831431-20180805150535/@comment-2605:A000:F8C8:9100:B8D8:2295:397E:30F5-20180916155042

The Sacrifice quest confirms this, though. And it also explains the difference between an Umbra and a normal Warframe is that an Umbra has one distinct, traumatic, memory from their past life, while normal Warframes have no memories of their past life.