Was Sauron a Balrog?

[Aganzir]

Originally Posted by Legate of Amon Lanc

I don't know from where I have it, but for some reason I am convinced that they were originally like Arien.

Me too... And I thought Arien was of Aulë's folk as well. I really have no idea where I've got this impression, maybe it's just something we speculated years ago with a certain downer.

edit: xed with Nerwen. Thanks.