Board Thread:Speculation House/@comment-31953669-20180124124137/@comment-26397825-20180312002719

Because Qrow is the strongest person there and had the potential to screw up the plan. Raven knew that she and Qrow were evenly matched at least, so she could keep him busy until the other pieces were in place and they could do the whole 'Cinder/Raven?Vernal go down to Vault' without interference from people like Qrow.