The Seventh Sun is a large OriCon ship and a part of the Kingdom sent to stop an Apostolosian superweapon. The majority of the crew of the Kingdom are aboard the Seventh Sun. Natalya Greaves and the rest of the Fairchild workers are among those stationed here, working to maintain riggers.
Locations mentioned during the Kingdom game are the bridge, communications, hangar bay, officer's lounge, commissary, research lab, and private quarters.
It was apparently taken over by the Righteous Vanguard some time after the Golden War; the Seventh Sun destroys some Minerva ships during "Do You Have Room For Me?" as Ibex prepares to take Counterweight.