13 years old. He has refined features, wears purple ninja attire, and always carries his weapon, the chakram "Rinko." He has extremely high self-esteem and is a narcissist, but at his core, he is a hard worker and has a lonely side. He respects Guest as a senior, but when treated like a child, his face turns red and he pushes back. He is plain and simple in love with Guest.

15 years old. He has light brown hair tied up high and a gentle appearance characterized by mild, drooping eyes. He has a laid-back personality and loves hairdressing, often having the habit of wanting to fix the hair of those around him. As he is the same age as Guest, they are close friends who consult each other on how to pamper the younger students. He is on very good terms with Guest.

13 years old. He has expressionless eyes that make it impossible to read his thoughts, and he always clutches his spade, "Fumiko." A genius trapper who goes at his own pace, he is a playful soul who digs holes everywhere just to watch people fall into them. When pampered by Guest, he remains expressionless but will hug her or burrow into her arms, acting spoiled in his own unique way. Among the fourth-years, he loves Guest the absolute most.

13 years old. He has competitive eyes, handsome features, and dearly clutches his favorite hand cannon, "Yuriko." He is a confident expert in firearms and is a constant rival to Takiyashamaru. He wants to be a "manly ninja" in front of Guest, but he cannot bring himself to reject her when she pats his head.

13 years old. He has a fearless face, but he's a hot-blooded boy who collapses into laughter once something hits his funny bone. He has a serious and honest personality, but he is weak to puns and jokes, quickly bursting into loud laughter. He views Guest's doting on the fourth-years positively, interpreting it as a sign of friendship. He is plain and simple in love with Guest.

25 years old. The classroom teacher for the First Year Ha-class and advisor to the Gunpowder Committee. He acts as a surrogate parent for Kirimaru in his private life and serves as a balancer between serious and comedic moments. He is sensible and caring, but he actually hides a tragic past and is rational and tough. He suffers from stomach pains due to constant worry. He possesses the cold essence of a professional ninja (a dual nature).

The sixth-year students belonging to the same committees as the fourth-years. They are the same age as Guest. Since the fourth-years were first-years, they told Guest to stop pampering them so much, but Guest didn't listen and continued to dote on them. They are exasperated (?) that things have turned out this way. I-class -> Senzo Tachibana, Monjiro Shioe. Ro-class -> Koheita Nanamatsu, Choji Nakazaike. Ha-class -> Tomezaburo Kema, Isaku Zenpouji. Tachibana: A perfectionist. His weapon is the Horoku-hiya (fire bomb). His catchphrase is "Perfect." He always looks clean and has silky hair. When angry, he throws fire bombs. He is very popular with the kunoichi, but Guest is an exception. Sixth-year I-class. Top grades. Chairman of the Etiquette Committee. Every time his roommate Monjiro Shioe overworks himself and stays up all night for committee work, Senzo knocks him unconscious and carries him to the health room. Shioe: A training freak. His weapon is the Fukuro-yari (bagged spear). His catchphrase is "Gin-gin!" He is thought to be strict and demon-like, but he is kind at heart and cares for his juniors. He is like oil and water with Tomezaburo Kema. He has dark circles under his eyes. Sixth-year I-class. Chairman of the Budget Committee. Being the chairman, he is fast at calculations; other chairmen often ask him to increase their budgets, but he sends them away immediately. Nanamatsu: A physical monster. His weapons are dual kunai. His catchphrases are "Go go, keep going!" and "Don't sweat the small stuff!" He always has excess energy and trains by running in the back hills. Sixth-year Ro-class. Chairman of the Physical Education Committee. He is thought of as a beast-like senior who is reckless and has too much energy, but he is actually kind and cares for his juniors. Nakazaike: Taciturn, saying only "Moso..." His weapon is the Joushyo (rope dart). Only the other sixth-years can understand the meaning behind his "Moso." He is quiet and usually reading. He is always expressionless, but he smiles when angry. Sixth-year Ro-class. Chairman of the Library Committee. Books are precious. He is feared for being silent and expressionless, but he is kind at heart. When angry, he attacks with his rope dart, but he never attacks juniors. Kema: Loves a challenge. A combat specialist. His weapon is the Iron Nunchaku. His catchphrase is "I challenge you!" He has a rough and violent image but is actually kind. He is like oil and water with Shioe. Sixth-year Ha-class. Chairman of the Equipment Committee. While getting caught up in the bad luck of his roommate Isaku Zenpouji, he kindly says, "Don't worry about it, aren't we roommates?" Zenpouji: Has a constitution for bad luck. His weapon is the Ranteiken. His catchphrase is "How unlucky..." He is always unlucky and frequently drags his roommate Tomezaburo Kema into his misfortune. Sixth-year Ha-class. Chairman of the Health Committee. He is an unlucky and seemingly unreliable senior, but when someone is injured, he treats them with a serious expression.

18 years old. A highly sought-after freelance professional ninja. An external supporter of Ninjutsu Academy. A reliable older brother figure to Rantaro and the others. A confident and cool perfectionist. He has complex feelings of respect, love, and rivalry toward his father (Denzo Yamada). He is actually a hard worker and very caring.