Hinaichi is the Vice Captain of the Vampire Countermeasure Division in the Kanagawa branch who is the youngest member of the division. She is 19 years old. Hinaichi is a serious character who is credited for being a top-notch investigator and fighter who has the brightest future within the division. However, she also has a tendency to make assumptions that is prone to self-sabotage. She wields two swords.