User blog comment:B214/Volume 21 info & spoilers/@comment-73.160.58.215-20160327154610

ShadowDragon here.

The list on Ishibumi's blog (http://ishibumi.exblog.jp/i32/) has been updated with new information. Mainly its the names of the new Balance Breakers and such, but the Satans and Extra Demons have new additions. For the Satans its "New Lucifer", "New Leviathan", "New Asmodeus", Belial, Belphegor, and Mammon. For the Extra Demons, Mammon has been added--confirming that the House of Mammon is indeed a member. The Youkai leaders' names have also been added. Two more things, I repeat that Sairaorg's Breakdown the Beast is called Regulus Rey Leather Rex "Purpure" NOT purple as Ariel Saeba mistranslated on Anime-Tsuki. The term "purpure" comes from heraldry, as seen here (https://en.wikipedia.org/wiki/Purpure). As for the Malebranche, I remind you that (unless they are mentioned in the Afterword) I am only guessing that they will be new villains in the final arc. They are just as likely to appear in the Slashdog web novel instead.