it's kerrigan, the queen of blades. 
her Bio
Brought into the Confederate Ghost program as a child, Kerrigan was
never given the chance for a normal life. The neural processing
treatments that were used to dampen and pacify her latent psychic
powers left her a withdrawn and introverted young girl. Forced to
murder countless enemies of her Confederate masters, Kerrigan was
finally exposed to a series of clandestine experiments conducted by
the Confederate Government.
During a raid on a remote Terran outpost, Arcturus Mengsk
discovered and rescued Kerrigan from the Confederate scientists.
The Confederates had ruined both their lives, and it was a simple
matter to convince the young woman to lend her formidable combat
skills to his rebel strike-force: The Sons of Korhal.
After faithfully serving the Sons of Korhal for years, Kerrigan was
abandoned by the power-mad Mengsk, and left for dead upon the
Zerg-infested world of Tarsonis. The Zerg Overmind, sensing
tremendous psychic potential and an indomitable will within
Kerrigan, decided to incorporate her into the Swarm. Kerrigan's
genes were spliced with those of the Zerg, transforming her into
the terrible 'Queen of Blades'. Kerrigan's latent psychic powers
manifested themselves rapidly, allowing her to lead the Zerg to
countless victories over their enemies.
After the Overmind was destroyed by the Protoss hero, Tassadar, on
the planet Aiur, Kerrigan began to bend the scattered Zerg Broods
to her will. Opposed only by the Renegade Cerebrates led by
Daggoth, Kerrigan hoped to gain mastery over the entirety of the
Zerg Swarm.
