Tsugumi Hattori (服部 つぐみ) is the friend of Musashi and Kojiro Kanemaki and part of the Kanemaki Bushi alongside with them. She aims to become a kind Bushi who protects the weaker people just like her sister. Hattori is a sweet girl who is quick to forgive. It is, however, also shown she has a fear of letting other toxic people go, and she is only able to do it when her friends helped her. It's shown she is also a good fighter. She is manipulative as she flashes for boys to change their attention to that, so she can kill them off. It is entirely possible that she harbors a certain degree of attraction towards Musashi by taking into consideration how annoyed she was when the young lad blushed before Mitsuru and Michiru respectively. An interesting aspect of her personality is a combination of protecting others just like her older sister did in the past and a need to follow orders under a "Lord" to keep her damaged self-esteem in check. The latter was initially exploited by Lord Kosameda until she broke her ties with him and it only returned, although on a comical manner, when Kojiro became her "clan leader" at Daito Mine.

Orient
At age 10, best friends Musashi and Kojiro sat in excited silence as Kojiro's father spun tales of evil demons who preyed on the innocent, and the warriors who defeated them. Practicing swordplay, the two swear an oath to become the strongest in the world. But as they grow up, Kojiro turns cynical, and Musashi comes to realize that he can't turn back 150 years of demon rule on his own. He's being called a prodigy with a pickaxe, and he's almost ready to settle for a life of labor. Yet he can't shake the feeling that he still has a responsibility to act…and, soon, the injustices of his world will force his hand… [Kodansha]

Orient (Manga)
At age 10, best friends Musashi and Kojiro sat in excited silence as Kojiro's father spun tales of evil demons who preyed on the innocent, and the warriors who defeated them. Practicing swordplay, the two swear an oath to become the strongest in the world. But as they grow up, Kojiro turns cynical, and Musashi comes to realize that he can't turn back 150 years of demon rule on his own. He's being called a prodigy with a pickaxe, and he's almost ready to settle for a life of labor. Yet he can't shake the feeling that he still has a responsibility to act…and, soon, the injustices of his world will force his hand… [Kodansha]