Board Thread:Off Topic/@comment-25147527-20140706222821/@comment-4010415-20140706225339

He's not Qrow, trust me. Rooster Teeth showed off an exclusive clip of Pyrrha fighting Mercury in an arena, with Ruby watching. Ruby said to Emerald "Hey, your friend's really good." Which means Ruby doesn't recognize Mercury. If he was Qrow, she would've recognized him immediately.

Also, Monty recently said that Qrow wields a scythe.