Provisional Title: Return to the Station
Aldrin cycler. Also known as a castle. It's less of a ship and more of a space station whose orbit crosses that of Jean and the gas giant on a regular cycle.
Once up to speed, it uses almost no reaction mass. It can carry heavier shielding than a regular ship. This could really help the robots with their project to inhabit that moon orbiting the gas giant.
Any ice asteroids in its path of travel?
Ice asteroids were one of the first things this station grabbed. Though to be safe, we'll avoid names like the Titanic.