Board Thread:Episode Discussion/@comment-24573226-20171012080158/@comment-27234079-20171016030826

Nobody mentioned this earlier, but in the theater release, Miles explicitly said in the V4 finale behind the scenes bit that Ruby has not dealt with the death of Summer, or anything else pre-Volume 3. And V3 for that matter. He outright stated she's slowly bottling it up, and will explode at some point (he didn't specifically say it was Volume 5 though).