The being now known as Izsha was one of the Queen’s truly unique developments, marrying traits like episodic memory to the collective consciousness of the Swarm. However, as “her” functions were more suited to hive organization than warfare, Izsha remained largely unknown to the enemies of the zerg.
Among the zerg, Izsha occupies a similar role to that of a terran military’s adjutant – assisting with navigation, logistical analysis and record-keeping. Izsha is physically grafted to the nerve center of the Queen of Blades’ Leviathan, where she filters through the ceaseless volume of sensory data that floods the Swarm with each passing moment.
The suggestions and guidance that Izsha offers come from a time before, when the Queen of Blades suspected a great and terrible danger to the Swarm, and took action to preserve her own memories for the future of the zerg. Izsha is literally a living record of the experiences of the Queen of Blades, destroyer of worlds – of what use can she be to Sarah Kerrigan?