Hana is one of twin sisters who join Hiwou's group after mysterious Clockwork Dolls kill their mother. This trauma drives them to search for their grandfather. As samurai daughters, they witnessed a treasonous plot against the government, marking them as targets pursued by the antagonistic Wind Gang alongside their new allies. Their samurai heritage shapes their combat abilities and values, aiding the group's defense against the Wind Gang.

A significant revelation in Kyoto uncovers that one twin is actually a prince, indicating Hana or her sister concealed this identity for protection. This disclosure connects to wider political conspiracies involving the shogunate. Despite the heightened danger, the sisters remain committed to the group, sharing its goals of finding safety and resisting the Wind Gang's aggression. Their direct experience witnessing treason and suffering the Wind Gang's violence fuels their alliance with Hiwou and active participation in the journey.