Na'roga family manor, master bedroom.
Inside the biggest of the rooms in the young demoness' family manor, a middle aged couple of demons was sitting on a large bed with expressions filled with pain. The male demon possessed massive folded leather wings as black as the night itself, while the demoness, while devoid of wings, had long and thin horns.
"We haven't even tried to fight back.." muttered the demon while clenching his hands, and causing his wings to emit a faint black smoke.
Feeling her husband's rage, the demoness put a hand on his shoulder, and said "We have no other choice.. Ever since your father was killed by his, we have been too weak to resist. She knew that too.. That's why she made this decision."
Okay, I know it's confusing. The division of the groups are 1-40/41-80/81-XXX, while the division of the power of the single demon, is 1-50/51-99/100-XXX
So every Noble demon who has a power beyond the eightieth phase can be the leader of a highborn faction. While not all highborn factions require a demon lord to control them.
Anyway, hope that made things clearer.
Thank you for taking the time to read my work!!