Board Thread:Questions and Answers/@comment-32556264-20170719225522/@comment-71.244.128.138-20170726143943

I say Shigama Doji, since he was the one who brought about the vampire race as the First Progenitor, started the Seraph of the End experminet usin g  the Imperial Demons by possessing every head of the Hiragi family. Definately the master manipulator of this series.