"Great Progenitor."
The Progenitor Tu, crowned with the skull of a Heavenly Demon, strode to the edge of the pool and said solemnly to Great Progenitor Qiu Xiang, "Summoning us here, I wonder what matter you wish to discuss."
Though the Twelve Tribes are united under Great Progenitor, the three Clan Progenitors rank below him, yet their positions with each other aren't hierarchical, with Great Progenitor at the head and the three of them ranked afterward.
After all, even though Great Progenitor Qiu Xiang is a Celestial Master, they are also figures of the Blood Exchange Realm and won't be easily swayed by Qiu Xiang.
Out of the Four Departments, Great Progenitor Qiu Xiang has the best relationship with Wuzu, as Qiu Xiang originated from the Wu Clan's Four Departments. After becoming the Great Progenitor of the Twelve Tribes, naturally, he favors the Wu Clan's Four Departments, gradually growing into the strongest over several decades.