Board Thread:Lore Discussion/@comment-24459775-20140315020817/@comment-16047389-20140505205327

According to Manscorpion Tark, after you kill Freja he congratulates you on killing his master, but says that his master "never dies. And that he changes form so that he can seeth for all eternity". We haven't written down Tark's full dialouge yet, which is really disappointing, but basically he mentions that his master was born "with a fatal flaw", that he "resented those that had what he lacked", and that "he eventually drove himself mad".

I believe that his master was Seath, that the fatal flaw was his lack of scales, and that those that he resented that had what he lacked were the other Everlasting Dragons. Since the Freja possessed the Paledrake Soul, I'd say that Seath is in fact the Dukes Dear Freja. After all, we never did collect Seath's Soul in Dark Souls. Only the Soul that Gwyn gave him.