User blog comment:FTWinchester/My Problems on Naomi's Character/@comment-50.89.225.132-20130508163439/@comment-3481504-20130508181800

But, how can they really be a group of Angels never seen before?

The Archangels occupied Heaven, apparently, second to the Leviathan. Meaning, they would know every single Angel that proceeds after them. Similarly to how Lucifer just knew Castiel.

I, personally, simply assume she's either Throne/Wheel or a Authority.