User blog comment:B214/Question and Answers 4/@comment-180.191.68.156-20141222164842/@comment-16281343-20141222230324

Shidou Touji is Yaegaki Masaomi's superior and once one up the guys tasked to kill Yaegaki and his lover, Kureria (Diehauser Belial's cousin).

One of the reasons of Belial's treachery is to find out the real reason of her cousin's death as the case was covered up.