Board Thread:General Discussion/@comment-26185073-20160324013202/@comment-27082610-20160407043736

I feel like it was implied that the Rose bloodline was originally part of a larger clan of SEWs, which dwindeled down to a single family either through natural causes (read: taking on more Grimm than they can handle) or from Salem acting against Ozpin, since they seem to be having this shadowy power struggle between Life and Anti-life.