Different theory about Aimians, unless someone can confirm that they aren't originally from Roshar.
We have WoB that some races on Roshar are Parshendi-Human hybrids, e. g. Horneaters (explaining why they can see spren when others can not), so I think it could be plausible that Aimians also have some Parshendi mixed in there somewhere. All the weird stuff they can do with their body (plus the shadow thing) seems pretty Voidbringer-y to me. This would also explain why so many people immediately think Voidbringer when they see an Aimian (although anything that people can't really explain or frightens them is conected to Voidbringers in the minds of people).
Still, what if people still associate Aimians with Voidbringers because their ancestors really were Voidbringers and even if that was forgotten myths or rumors developped connecting the two?
Could the scouring of Aimia have something to do with this?
Could it be possible for a Smoke- or Light/Nightform (not sure if these exist) Parshendi to have descendants with similar powers? I assume that when a new Parshendi is born that he or she is in Dullform but could a residue of a form carry onto a human-parshendi descendant? We know that some investiture like Allomancy is hereditary, so I think it's not too far fetched.
I do have to admit I dont see a Voidbringer and a Human having some kids during a war and thus creating an entirely new race, but I thought its a nice theory.
Thoughts?