Hachisu is a young female ninja affiliated with the Iga clan, serving as a supporting character in the narrative. Her name, which translates to lotus or water lily, reflects a common naming convention within the series.

In a world where many warriors possess supernatural eye techniques or other mystical abilities, Hachisu is notably different as she does not possess any specific magical talent or innate ninja ability. A flashback reveals that her brother once told her she lacked magic, advising her to carefully choose her tools if she wished to become a skilled ninja. This limitation defines her approach to combat. To compensate for her lack of supernatural power, she becomes highly proficient with handguns. Her signature technique is a rapid-fire method known as the Lotus Root gun, through which she demonstrates remarkable skill with firearms.

Hachisu maintains a close working relationship with Gorone Negoro, a craftsman from whom she constantly seeks improvements to her pistol. She is shown to be very attentive to the weapon's performance, specifically questioning issues related to reloading speed and trigger sensitivity. This ongoing dialogue highlights her dedication to mastering her chosen tools and her pragmatic understanding that her effectiveness in battle depends on the quality of her equipment.

As a character, Hachisu represents the struggle of an ordinary person trying to find her standing in a world dominated by individuals with overwhelming supernatural powers. While she is identified from the first episode as a main character, her specific background, personality traits, and narrative development are not extensively detailed in available sources. Her role in the story involves navigating the conflicts that arise between the ninja clans alongside her more powerful peers.