Hanzo National Academy

National Hanzo Academy is a prestigious ninja school. It was founded by and named after Asuka's grandfather, Hanzō. It is affiliated with good ninja. Characters include Asuka, Ikaruga, Katsuragi, Yagyu, Hibari, Daidōji, and Kiriya. A famous academy which, having been founded in 1919, is nearing its 100th anniversary. One thousand students are enrolled there. However, mixed in with the ordinary student are a few students in the Shinobi training course. The academy was originally founded as a normal high school, but when the Shinobi course began it changed its name to "Hanzo", after the legendary Shinobi. The only people who know of the Shinobi course's existence other than the instructor, Kiriya, are the principal and vice principal. In addition to Shinobi classes, Kiriya also teaches ordinary math classes. And this place is a very well-known ninja school.

Asuka has a joyful and friendly personality and believes in teamwork, sticking together and friendship. She often appears to be gullible or clumsy, but she makes up for it with her determination and earnestness. Due to her grandfather's teachings, Asuka has somewhat of a pacifist nature and doesn't believe in fighting or hurting others unless she views it as completely necessary. Because of this, other Shinobi from rival factions often view her as naive given the nature of the Shinobi profession, which requires them to take lives. Her weapon is twin swords.

Ikaruga holds the responsibility of being the leader of a five girls strong Shinobi team. Usually a calm individual, she can become highly agitated by Katsuragi's lecherousness. Like Katsuragi, she hides her sadness behind her cool exterior, but the love of her fellow Shinobi have helped to soften the pain of her wounds. She also has a knack for cooking. Her weapon is an odachi named Hien.

Katsuragi was defined by losing her parents; she vowed to become a stronger Shinobi and gained an extremely vivacious personality, and often hides her sorrow behind her mask of perversion. She takes almost every possible opportunity to grope her fellow Shinobi with intense glee. She enjoys the thrill of battle and competition. Her weapon is her powered boots.

Yagyu has a stoic and quiet demeanor, usually modest of her own ability, yet still very aware and in tune with it. She is also a very distant person, preferring to keep things to herself and relying on no one. However, she sees Hibari as a little sister figure, the two are always capable of making the other smile. She is extremely protective of Hibari, often rushing to her aid without delay and without question. Though this has saved Hibari on numerous occasions, it has also led Yagyu to underestimate her to a certain degree, or even to Yagyu's own misfortune. Her weapon is an oil-paper Umbrella with Hidden Bladed Tips.

Hibari is exceedingly innocent, trusting and cheerful. Despite often depending on others, especially Yagyu, Hibari dislikes having to completely rely on others, as it makes her feel like she is holding everyone else behind. She has no weapon.

Daidōji has a very "Punch first, ask questions while punching" personality. She has a strong sense of justice, she views her old upperclassman and best friend, Rin as more of a rival, rather that a mortal enemy. Even though she lost every match against her, she only strives to try again the next day. Her weapon is her own fists.

Kiriya is a teacher who is an older gentleman who is often seen in a black suit and various other formal attire. Very strict when in an urgent manner and he never lets his composure down, even when his students become annoying. As a teacher, he believes in providing his students with the tools and training they need to succeed so that they may grow into fine Shinobi. Though he rarely lets it show, he is quite protective of his students and cares for them deeply.