She is the Queen of blades as she say,Kerrigan is the most pitiless character in Starcraft Universe.Her word means nothing as Zeratul’s experiments shows.She always have a second plan and always keeps something secret from daylight.She has a very very big passion and can do anything for her aims.If someone trusts her, she will certainly charge to him or her.Kerrigan were wise and gentle before her infestation from Zerg.Her psionic abilities were conspicious and maybe the Overmind or far more beyond forces choosed her for this reason.After infestation she borned  again into the Zerg Swarm then she designed incridible things for the service of the Overmind.And some cerebrates like Zasz did not accept her fast successes.After the death of the Overmind in Protoss homeplanet Aiur,cerebrates became free and attacked each other. During this brood elimination Kerrigans’ brood survived and by the smart,danger and betreyal plans of Kerrigan,she has captured control of large brood population and dominated the Planet Char with her servants.