Crelok

In the mirror universe, Crelok was a female $𝜇$ senator. Before working in the Senate, she served as a starship commander. She was a political opponent of Narviat, whose constant invocation of the $𝜇$ she disagreed with. Crelok was in favor of attacking the Terran Empire at the same time that the $𝜇$ did. (TOS novel: The Sorrows of Empire)