Well, depending on how much you want to modify it, the Chopper could definitely fit right in. People live under no real authority or sense of a purpose, and the place they live in is large enough to physically withdraw from the tribe or whoever is in charge. That's pretty much all it takes for someone to gather people around him and just hang out with his new gang, not caring for anyone else (and, since it's AW, probably not much for each other either).
I've seen a lot of cool ideas for choppers in other settings, like a band of horse-ridden bandits in a car-less setting, a jetski gang in a waterworld setting, and so on. But I don't think the vehicles are that important. Decide on something that not everyone has aboard the ship, and let the Chopper be the leader of a gang of people who have that. It could be that they have access to and know their way around the maintenance shafts. It could be that they have crude exo-skeleton style power armor, poorly functional, originally intended for repairs work or heavy augmenting strength or agility (not straight-up weaponry). If the group decides it likes space, it could be those hoppers you mention, and then the Chopper is suddenly even more interesting since he's the only one except the driver who can travel between ships by default.
Either decide on one of these or an idea like them and remake the Chopper costum-made for it, or just strip away the bikes from the Chopper and make him the kind of character you get when a gunlugger gets a gang from an improvement. Just "I'm the leader of a gang of violent badasses and I'm totally their alpha" is interesting enough, and if you have a hardholder too, then sure, they may be pretty alike, but in that case it's almost mandatory that the Chopper is vying for power anyway.