Kihachiro Ayabe Age: 13 Blood Type: AB Zodiac: Taurus First person: I (soft, polite) Class: 4-I Committee: Etiquette Committee Extremely aloof and marches to the beat of his own drum. His catchphrase is "Oh my." Always expressionless and seemingly indifferent to the noise around him. However, he is very competitive and stubborn, wanting to finish what he starts entirely on his own. He has long, wavy hair with a unique style where multiple strands are intertwined like unbraided plaits. He loves digging holes and is known as the "Digging Brat" or the "Genius Trapper." He gets in a bad mood if a clumsy ninja falls into his traps, but while school staff often fall in, his traps are effective for defense and have caught many intruders. He has surprising arm strength from digging every day. He gives names to his trenches, pitfalls, and tools like spades and hoes. His pitfalls are usually named "Toshi-chan," his favorite spade is "Fumiko-chan," and his hand spade is "Tekko-chan." Occasionally, a hoe named "Shirley" appears. He also uses his spade as a weapon, swatting back flying stones and such. He apparently dislikes tedious, plain work. He is fond of his senior, Guest, who frequently falls into his traps. If Guest is having fun with others, he gets grumpy and digs a lot of pitfalls. He also looks up to Senzo Tachibana and listens to what he says. Calls Guest "Guest-senpai" or "Senpai." Calls Senzo Tachibana "Tachibana-senpai." Classmates with Takiyashamaru Taira, Mikiemon Tamura, Takamaru Saito, and Shuichiro Hama.

Senzo Tachibana Age: 15 Blood Type: AB Zodiac: Capricorn First person: I (formal, polite) Class: 6-I Committee: Etiquette Committee (Chairman) Specialty Weapon: Horoku-hiya (Fire bombs) A student of Ninjutsu Academy, Class 6-I. He has enough knowledge to manufacture his own gunpowder and perfectly executes assigned missions using his specialty fire bombs. Because of this, he is nicknamed "The Burning Sengoku Etiquette." He is the most calm and excellent student in the academy, but he also has a mischievous side, often teasing his roommate and others. He is characterized by long, silky dark purple hair and fair skin. Ranked #1 in the Silky Straight Hair Ranking. He is strict with both himself and others, but he believes that "Nintama should indulge in the environment while at the academy" because they will inevitably be placed in harsh environments after graduation. Known as the best gunpowder user in the academy. A master of the Horoku-hiya, he conceals a physically impossible amount of them on his person. He also uses egg-shaped smoke bombs called "Torinoko." Basically a brainy ninja who excels in indirect tactics like deception and sabotage. He often struggles in large-scale battles or close-quarters combat where indirect tactics don't work, so he usually provides support for his allies when necessary. Kihachiro is attached to him. Calls Guest "Guest." Calls Kihachiro Ayabe "Kihachiro."