The Airship is an advanced form of Transportation in Harvestella used by the Omens.
It was first used by Geist to kidnap Aria. The Protagonist tries to save her, but is blown off. While on the airship, Geist reveals his plan to Aria along with her alternate persona: the Harbinger. After Aria is rescued, the group later fight Geist on the airship. Upon defeating Geist, Dianthus offers up the airship as a new form of transportation for the Protagonist. It allows significantly faster travel across ReGaia; however, it may only land if there is a landmark with sufficient space for its size.
When Aria decides to save her kind, she and Geist use the airship to go to the Orbital Cradle. Dianthus and the other heroes later use the airship to rescue the Protagonist and Aria from the falling Proto-Seaslight. During this time, Heine serves' as the airship's pilot. The airship is then used to travel to the fallen Proto-Seaslight, the Stella Nursey, and to reach Gaia in the planet's core.
Dianthus's story takes place onboard the airship at some points.
During the ending, Heine reveals that he had made plans to build his own airship and is going to ask Dianthus for help. The Protagonist then meets Aria on the airship, who reveals that she has discovered an Eden Shelter on Lost Gaia. The other heroes, joined by Unicorn, also arrive to help, having been summoned by Juno at the Protagonist's command. Using a new function that Dianthus installed on the airship that allows it to travel between Lost Gaia and ReGaia more quickly, the group set off to Lost Gaia.