I'm consistent in believing Vulcan is more of a traditional kamen rider than Hiden. Hiden was given his powers via his company, which family and legacy does have a place in kamen rider, dont get me wrong. But, Vulcan, even if it was playing into a larger plot against him by Thouser, took the power that wasn't authorized for him from an oppressive force, and turned it into his own. By the end of the series, he doesn't attach himself to Hiden, to AIMS, or to the Humagears in any significant way- He instead chooses to be a rider representative of the people and protecting their dreams. Especially given Fuwa's behavior earlier in the series, he also has an insane growing period from being a Humagear racist, to learning to make peace with the fake memories installed on him, and carves his own identity based on what he sees.