Rebuilding the SwarmEdit
After hearing about Raynor's "execution," a bitter Kerrigan traveled to the leviathan so that she could build the Swarm into a force of vengeance against Arcturus Mengsk. On board, she met Izsha and Abathur as they explained their roles to their queen. As Kerrigan rebuilt her forces, the leviathan took her to Kaldir, Char, and Zerus.
Into Dominion SpaceEdit
The following section contains timeline information which isn't necessarily in chronological order.
Kerrigan informed Raynor's forces of his survival, and they were able to ascertain his location—the Moros, a prison ship. The leviathan and Hyperion ambushed the Moros while it was refueling at Atlas Station. While Kerrigan fought her way through Dominion troops, the leviathan kept sending more and more zerg into the ship to reinforce their queen. When the Moros was set on self-destruct, Kerrigan has the leviathan stabilize the part of the ship where Raynor was being held. The rescue was successful.
Assault on KorhalEdit
Kerrigan laid siege to Korhal. After wiping out the Dominion forces outside Augustgrad, the leviathan was brought to the surface. With the death of Mengsk and the battle's end, Kerrigan's forces returned to the leviathan and departed the planet to find and engage Amon.
The leviathan is the main story hub for the majority of the Heart of the Swarm campaign. While Kerrigan is able to call a leviathan unit to the battlefield, unlike the Hyperion her particular leviathan has no distinct unit presence. It is only seen in story mode space or cutscenes.
The leviathan has two sections that Kerrigan can interact with:
This is where Kerrigan meets with her lieutenants to discuss plans for the Swarm. The majority of supporting characters are found here.