Board Thread:Speculation House/@comment-4830106-20151115174306/@comment-27124136-20151116020416

I'm fairly certain they're not directly grimm. Else Ozpin wouldn't have bothered making the distinction when Qrow said the things she made are fear and then he followed up by saying that fear brings the grimm.

They don't have to be machines, but that doesn't mean they have to be grimm either.