Bungo Inasa is Kasumi's fiancé and shares Ryo's family name. He possesses a brave and clever persona, fully comprehending the island's backward customs. To enable Ryo and her lover Ruka to escape, Bungo sacrifices himself by attacking Hotaruko and attempting to halt the demonic mannequins. Later narrative progression reveals Bungo is Ryo's great-uncle; this familial connection exists because his sister, Itsuki, was Ryo's grandmother, not her mother as initially suggested. His actions reflect a protective role towards his niece, driven by his awareness of the island's dark cult practices involving the sacrifice of women to sustain Mizuno. No further details exist regarding his appearance or development in other official media.