Celation
(The Master of) Celation was a Galactic Council delegate. He had apparently been persuaded to join the alliance by Zephon, and 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 in the alliance. The execution of Trantis ensured his 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, with Chen, Beaus and Malpha, he planned to form a new Galactic Council and agreed to go back to his own people and warn them about the Daleks' invasion plans and help fight them, if Steven and Sara would free them.
Celation resembled a bald humanoid with a hissing voice, and was covered in black spots. (DW: The Daleks' Master Plan)