Ethan Stewart

From The StarCraft 2 Wiki

Ethan Stewart was a crime lord on the planet Dead Man's Rock. He was infested by Kerrigan recently, and serves her as her "cohort". He loved Rosemary Dahl, whom he betrayed. Rosemary had shot Ethan, but he barely escaped death due to his doctors' surgical operation. Shortly after the operation, the Zerg had raided Stewart's fortress and took him to Kerrigan. Kerrigan then infested Stewart, to make him serve as her cohort.