Otoha appears to be a normal girl, but she is in fact a spirit, and only Takuma can hear or see her. She is always cheerful, and will appear out of nowhere, clinging suddenly to Takuma. She refers to herself with the masculine pronoun boku (僕?), meaning "I". She refers to Takuma as the "Promised Person" (約束の人 Yakusoku no Hito?). It is revealed that Otoha is the real Hinata Kagura, who fell into a river and drowned. She took the name Otoha from Hotaru's picture book that she drew herself. Before disappearing, Otoha shows Takuma a strange world, where she is his fiancée. Just before she disappears, she confesses her love for him, but says that she is not the one he belongs with.