Hana is the late mother of the protagonist, Nagi, in the live-action and anime hybrid series Dragons of Wonderhatch. She was a popular creator of manga, working as a professional artist in that field. Hana is not present in the main timeline of the story, having passed away before the events of the series begin. Her disappearance or death when Nagi was a child is a significant event that shapes her daughter's life and emotional state.

Within the narrative, Hana holds a position of immense, if mysterious, importance. Her existence is tied directly to the fate of Upananta, an alternate world where dragons live. The antagonist, Space, believes that Hana is the creator of Upananta. His central plan to save his own dying world revolves around a diabolical theory that killing its creator will prevent its destruction. This makes Hana a pivotal figure in the overarching conflict, even though she is not an active participant.

Hana's primary role in the story is as a posthumous character whose legacy drives the plot. Her past actions and her connection to the other world are a shocking secret that links the human realm and Upananta. A key relationship is with her daughter, Nagi. The series features an emotional reunion between Nagi and Hana, who is hospitalized at the time, indicating that Hana may still be alive in some capacity, though gravely ill or in a vulnerable state. This meeting is interrupted by the arrival of Space and his gang, who intend to kill her, forcing others to intervene to save her. Hana is also the wife of Taichi, who raised Nagi as a single father after Hana was no longer in the picture.