Common themes linking stories of demigods across various myths include the struggle for identity, the quest for acceptance, and the balance between human flaws and divine powers. These figures often face challenges that test their dual nature, prompting growth while navigating their roles in both mortal and divine realms. Additionally, demigods symbolize the bridging of two worlds, embodying the potential for greatness but also the burden of expectations and destinies. Narratives emphasize the idea that heroes derive strength from their mortal experiences, enhancing connections to humanity while pursuing their larger purposes.