Cloud 9 or Cloud Nine was a lighter-than-air structure with a palace built on it. The palace was anchored to Brighton and was the traditional residence of the mayor of the city. Not much is known about when it was constructed or its history.

It was destroyed during the Green Storm War by the Green Storm. It crashed into a Northern African desert, where scavenger cities scrounged off the wreckaged for months afterwards. Hester Natsworthy, upon the discovery of a secret involving the betrayal of Anchorage to Arkangel hunstmen led by Piotr Masgard, fled to the burning wreckage.