User blog comment:B214/Talk About What You Want! 2/@comment-24098614-20140630220501/@comment-16281343-20140630221103

Original FGS = Highest "bloodline"


 * 72 Pillars


 * Bael


 * Agares


 * and so on.

~Now that the original FGS are dead and the Maou clans are considered as outcast the clan with the highest bloodline is the Bael. That's why the First Head has the highest authority.