Board Thread:Episode Discussion/@comment-14138255-20161023154654/@comment-14138255-20161025001605

If she is with Salem, she could have killed Summer as a gambit to gain Salem's trust, and Qrow and (possibly) Summer knew this. Once Raven infiltrated Salem's inner circle, she had to lay low, but was still able to give Qrow advice and talk from time to time.

I don't know, I'm rambling. Maybe Raven left Taiyang because of her growing cynicism with...something, and then just sort of stayed there.