Shichika's older sister, she is the seventh opponent Shichika fights for the Deviant Blades. She's depicted as gentle and weak; however, she can be frightening and intimidating to face during a fight. Despite not learning her family's fighting style, she has keen senses, fast reflexes, and the ability to think ahead, as she had observed her brother during his training and is shown to have used Kyotō when attacked by three ninja. Her primary fighting ability is to, by simply observing any fighting technique, learn it, then master it on second observation. She also has an unnatural ability to recover from serious injuries and poisons. Although her brother leaves the island with Togame, Nanami eventually follows them. She had fought Shichika only once, which ended in a draw because of her body's condition, and is stated by Shichika to be even stronger than Hakuhei. During her travels, she killed off the Itezora clan in search of Kanazuchi, but she did not take it because the sword is not useful to her. She comes into possession of Bita after killing off the people in Shireizan. The katana is later seen jabbed into her chest, which over comes her physical weakness. She later confronts her brother and asks him to kill her in order to die normally due to her unnatural superhuman strength. In the end she's killed by her brother, granting her the death she always wanted.
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