so basically make an OC with their quirk being able to switch between the different Regalia in Air Gear

the Quirk is named Kings Road being able to turn their feet to ATs like how Iida can sprout exhausts on his body but here its only limited to their feet but they can change the wheels to the different regalia (or make your own if you want) using the Regalia ability takes some of their stamina and changing them takes a preset design to use it is very versatile but its only as good as the skill of the user

airgear. wikia wiki/Regalia