Eragar

As far as we know. Maybe I'm wrong on this--but have we seen any Aimians besides the one? Can they actually change their physiology? Or is Sanderson maybe hiding our kandra in plain sight? The backward shadow stumps me--but I'm confused by that regardless of whether someone is a kandra

Not sure if this has been mentioned yet (didn't have time to read through 12 pages), but what about the blue-skinned guy in WoK interludes? He can change his skin and such. Seems like a pretty good candidate.