Commander's pet

Because the Romulan Commander is best female villain Star Trek ever had^^ Mostly because she wasn't all that evil nor weak, fought well for her side but was out witted - that happens when you're in a conflict between the Empire and Federation.

But I'm so sure that if the fourth season of Original Star Trek had been made, she would have definitely had more apperances. There's like million possibilities for very complicated and fun twisted plots that could have been! Especially when we know that she fell for Spock.

Falling in love often in TV makes females loose most of their personality (seriously, even the most strong woman characters tent to become imbesilles when in love), but I really think that Charvanek managed to keep her pride in the very end. She was out witted, but so what? There's always the next time... and you know, she is the Queen of ship and ruler by her genes^^

(And you of course know that Romulans and Vulcans are basically matriarchies, and in my mind, Charvanek is reversed sovinist ha ha.)