Leibnitz

The Leibnitz is an airship owned by the Zeiss Central Factory built in S.1178, used for large scale maintenance and transport of other vehicles. It's the same model as other airships built by the Central Factory, but unlike them its color is orange and features work arms so it can perform its tasks. The Leibnitz makes periodic stops at Leiston Fortress to inspect its equipment and make sure it's performing properly.

When Estelle and Joshua try to find Maintenance Chief Gustav to request a combustion engine for Professor Russell's experiment with the Black Orbment, they are told he’s been at Leiston Fortress for a few days for an emergency repair on a military patrol ship, and see him returning to Zeiss on the Leibnitz. After learning that Professor Russell and the Capel unit are being kept inside Leiston Fortress, Estelle, Joshua, Tita and Agate use the Leibnitz to sneak into the fortress by stowing away in its cargo.

On the day after the group escaped from the fortress, the army visits Zeiss to check on the Leibnitz to see if it was responsible for the act. Gustav quickly moves the Leibnitz underground, to receive an overhaul and hide any traces of its involvement.

Rehmann and the Leibnitz crew arrived at the Zeiss Landing Port right before the earthquakes started happening around the region, luckily avoiding any damage during the docking process.

After the earthquake at Sanktheim Gate, the Leibnitz crew starts planning its leave for Leiston Fortress to load a new orbal engine onto the Arseille. By the time a different earthquake happens at the fortress, the airship is ready to undock. Aldan manages to take a picture of the Leibnitz as it leaves Zeiss to install the new engine onto the cruiser.

During the Orbal Shutdown Phenomenon, Zeiss was hit while the Leibnitz was being moved in the landing port, and it became stuck in a halfway spot between the docks as the ship was unable to fly.

The Leibnitz is used by Erika Russell to retrieve the Recluse Cube from the ruins of the Liber Ark at the bottom of Valleria Lake.