My idea is, if you're willing to work on lore elements, someone who belongs to a warrior-cult that worships the bond between man and fighting vehicles - non-Juggernauts included, but since those are the ones who get inhabited by intelligences, they're special.  They practice a weird combination of asceticism and car tuner culture where they do keep possessions, but only as long as it takes to sell them to fuel maintenance and improvement of their personally owned craft.  They live like monks in the desert, but their rides are wondrous things.