User blog comment:B214/General Discussion/@comment-30924344-20170926172826

From the Japanese wiki:

ベリアル家当主 Belial Family Owner

ディハウザーの父親. Diehauser's father (So his father is now the head and this would mean Ishibumi is setting Diehauser up to be a Satan).

家族を大切にする人物で、クレーリアの死の真相やそのことが息子を追い詰めたことを知ると、ゼクラムに直談判した. その際憤りのあまりゼクラムをぶん殴ってしまい、大王派を離れアジュカの傘下に入ることになった.

He values the family and from knowing his son pursued answers to Cleria's death, he spoke directly to Zekram about it. He was beaten by Zekram who was angry with him and he then became affiliated with Ajuka. (Is this right?)