User blog comment:Jopjopjop/SlashDog/@comment-73.46.6.122-20150727214342/@comment-26527700-20150727234722

It would be interesting if they did continue. Moreover, besides the other two fiends, Azazel mentions that two other survivors possess Sacred Gears and that both were placed under Grigori protection, so there's always a chance for them to show up as well.