Celation had apparently been persuaded to join the alliance by Zephon. When Zephon attempted to leave the alliance, he expected wrongly that Celation and Beaus would join him. Along with Trantis and Mavic Chen, he was one of the most powerful leaders of the alliance.
The execution of Trantis ensured Celation's loyalty to the Daleks, but his jealousy and rivalry with Chen led to the end of the alliance. He became the most forceful opponent of Chen, demanding his expulsion from the Council, but after they were betrayed by the Daleks, he planned with Chen, Beaus and Malpha to form a new Galactic Council. He agreed to return to his own people and warn them about the Daleks' invasion plans and help fight them, if Steven and Sara would free them.