From a young age, Naoya was always praised and told by others that he was a genius. He was severely spoiled as the youngest and most promising of the Naobito's children. He was conditioned to view himself as his father's successor and as a result, Naoya's arrogance grew to unbridled levels even as a small child. He grew up being an arrogant and misogynistic man with a reckless and conceited attitude. He prefers hand-hand combat instead of using weapons.