Izsha

Izsha was a unique zerg advisor in service to Sarah Kerrigan, one of a kind among the Swarm. Physically grafted to Kerrigan's leviathan, she served much as a terran adjutant might, handling briefings, reports, and record-keeping. She kept the memory of the old Queen of Blades alive for Kerrigan while remaining a rational individual in her own right. (StarCraft II: Heart of the Swarm)

Origins#

Izsha served the Queen of Blades in the years after the Brood War, when Kerrigan held her forces on Char. Sarah Kerrigan used her to store all her ideas, thoughts and plans. As Izsha later explained, the old Queen of Blades never told the Swarm what war she was planning for, saying only that she had seen a vision of their extinction and wanted them to fight to the last. (StarCraft II: Heart of the Swarm)

Advisor to the Queen Returned#

After her de-infestation at Char, Kerrigan returned to her leviathan to turn the Swarm against Arcturus Mengsk and reunited with Izsha aboard it. On the frozen moon of Kaldir, Izsha reported that most of the local zerg answered to Broodmother Nafash, who sought to build her own Swarm, and advised Kerrigan through the battle against the protoss present there, warning of the sub-zero conditions and noting her discomfort at the captive protoss whose psychic presence she found disturbing. As Kerrigan grew troubled by the bloodshed, Izsha reminded her that the protoss were the enemy by definition, and pressed, after a hard victory, whether her queen would find any joy in killing Mengsk if she took none in killing her other foes. (StarCraft II: Heart of the Swarm)

On Char, Izsha counseled that Kerrigan would have to bring Broodmother Zagara back into the fold to defeat the Dominion, and after that victory she told Kerrigan the story of her own past as the Queen of Blades, of how she had dispersed the Swarm to seek the Keystone and so left most of her broods in deep space when the Dominion struck. On Zerus she reported the gathering of the primal zerg and warned that the awakened Zurvan's power outstripped Kerrigan's own, a risk Kerrigan accepted to claim the power of the homeworld. (StarCraft II: Heart of the Swarm)

The road to Korhal#

At Skygeirr, Izsha relayed the message from the zerg individual who proved to be Alexei Stukov, arranged the alliance to destroy the hybrid-breeding station, and alerted Kerrigan to the Tal'darim defending its depths and their commander Emil Narud. When Kerrigan was gravely wounded slaying Narud, Izsha and Zagara watched over her recovery, and afterward Izsha reminded her queen of the threat of Amon, which Kerrigan had not forgotten but meant to face only after Mengsk. She was confused by Kerrigan's insistence on rescuing Jim Raynor from the Dominion and on sparing the terrans, but relayed the broodmothers' objections and the progress of the operation all the same. (StarCraft II: Heart of the Swarm)

In the assault on Korhal, Izsha reported the converging Dominion fleets, advised on the orbital descent that would cost countless pods, and kept Kerrigan apprised as the Psi Destroyer tore at the Swarm and as Dehaka's counterattack destroyed it. She confided that she had feared the zerg would never reach the surface, and feared too that Kerrigan would abandon the Swarm once her revenge was done; Kerrigan assured her they would face the war ahead together. Izsha tracked the arrival of Jim Raynor's Hyperion in the final battle, through to the defeat of Arcturus Mengsk. (StarCraft II: Heart of the Swarm)

Nature#

Izsha was more reasoned than the feral broods yet still wholly zerg, thinking as an individual. She found the psychic presence of the protoss disturbing, took satisfaction in the Swarm's victories, and was loyal to Kerrigan even as she questioned her queen's stranger mercies. Unlike Abathur, whose interest lay only in evolving the Swarm, Izsha offered Kerrigan a voice she could talk to as well as command. (StarCraft II: Heart of the Swarm)