Sarah Kerrigan spent years evolving and shaping the Zerg to better reflect her vision of the Swarm, a part of which was adapting the Queens of old to be more like herself so they could help lead the Swarm. But, to change the strain to what it is Kerrigan had to use human essence, right? Will later include JimRaynor, Arcturus Mengsk, Matt Horner, and Mira Han as ensemble cast.