User blog comment:Tommy,Klaus&Kol2012+/Were the shedim confirmed or even hinted to appear in the final season at comic con?/@comment-4554525-20190723145945/@comment-34461065-20190726022538

Rowena and Ketch were brought back because they were written as recurring characters,. From tehir first season, they were meant to be in the plots and stories, they were not one episode villains. They had been written from the start to be seen again