[quote=Dr Fetus]
Ah but can it be a high demon?That's what I wanted and I assume High Demon Lords are part of the Legion Commandorium.
[/quote]

Yes, High Demon Lords are of the Legion Commandorium, Demon Lords are beyond the Legion and the Supreme Demon Lord is the leader of the Legion Commandorium, usually there'd be a Devil who commands everything, but he died.