Arunzell
From Tardis Wiki, the free Doctor Who reference
Arunzell was a Tolian. He told the Seventh Doctor and Raine Creevy about the plight of his people. He persuaded them to re-energised his race, which resulted in their biology being rewritten into a stronger species. He then entered an alliance with the Reborn Master, to become the masters of all dimensions. (AUDIO: UNIT: Dominion)