Haruhiko Kamiazuma is the son of Kiyotsugu Kamiazuma and a member of the Kamiazuma family, entrusted with protecting Kamitsumihara. He relishes the social privileges of his status while embodying the persona of a playboy. His exaggerated confidence in his own attractiveness frequently becomes a source of comedic relief, as his attempts at romance often result in awkward or ineffective encounters. A childhood injury from the Stone Sword left a distinctive scar on his back. His father Kiyotsugu carries implanted memories from his brother Kiyoharu, caused by a shard of a magical mask, creating a complex family dynamic marked by mistaken identities and trauma. Haruhiko consistently functions as a supporting character providing comic elements across the series' media adaptations, with no documented evolution in his personality or circumstances.