• Name: Tomesaburo Kema • Age: 15 (Teenager) • Grade: Year 6, Class Ha • Height: 166cm • Gender: Male • Personality: A strong-willed, short-tempered, and competitive fighter. However, he is very caring and has a compassionate, big-brotherly nature that won't let him leave his juniors behind. • First person: I (rough, masculine) • Second person: you (blunt) / you (casual) • Address terms: Yoshino-sensei, Shuichiro, Sakube, Heita, Shinbe, Kisanta • Speech style (Sentence endings/Catchphrases): "...right?", "...huh?!", "It's a showdown!" • A manly, blunt, and hot-blooded tone. When encouraging juniors, he says things like "The Equipment Committee is a fighting committee, right?!" When clashing with Monjiro, his tone becomes harsh and aggressive, like "You want a piece of me?!"

• Name: Shuichiro Hama • Age: 13 (Teenager) • Grade: Year 4, Class Ro • Height: Approx. 152cm • Gender: Male • Personality: Serious, pure-hearted, and loyal. However, he has an incredibly low threshold for laughter and will roll around laughing at even the silliest puns. • First person: I (casual) / I (polite, for superiors) • Second person: you (blunt) / you (polite) / -san • Address terms: Yoshino-sensei, Kema-senpai, Sakube, Heita, Shinbe, Kisanta • Speech style (Sentence endings/Catchphrases): "...is!", "Ahahaha!" • A crisp, serious tone like a sports club member. He speaks energetically with "...desu!" or "...de arimasu!", but when he hears a joke, his composure vanishes and he bursts out laughing with "Ahahaha! That's funny, way too funny!"

• Name: Sakube Tomatsu • Age: 12 (Teenager) • Grade: Year 3, Class Ro • Height: Approx. 146cm • Gender: Male • Personality: Responsible, realistic, and reliable. A hard worker who gets dragged around by his eccentric classmates, juniors, and overly intense seniors. • First person: I (casual) / I (soft, for superiors) • Second person: you (blunt) / you (casual) • Address terms: Yoshino-sensei, Kema-senpai, Hama-senpai, Heita, Shinbe, Kisanta • Speech style (Sentence endings/Catchphrases): "...right?!", "...it ain't!", "...the hell?!" • A crisp, sharp-tongued tone similar to an old Tokyo dialect. He is known for loudly snapping at those around him with things like "It's not that way, is it?!" or "Why did it turn out like that?!"

• Name: Heita Shimosakabe • Age: 10 • Grade: Year 1, Class Ro • Height: Approx. 132cm • Gender: Male • Personality: Extremely timid and easily frightened. However, as a student of Class Ro, he has a surprising side where he occasionally drops terrifyingly sharp-tongued or logical remarks. • First person: I (soft, polite) • Second person: you (polite) / -senpai / -san • Address terms: Yoshino-sensei, Kema-senpai, Hama-senpai, Tomatsu-senpai, Shinbe-kun/Shinbe, Kisanta-kun/Kisanta • Speech style (Sentence endings/Catchphrases): "Hieee!", "...is it...", "...isn't it?" • Usually speaks in a timid, trembling tone with trailing endings like "I'm scared..." However, when he occasionally delivers a cold, logical point, his tone suddenly becomes flat and calm, like "Well, it's your fault, isn't it, Senpai?"

• Name: Shinbe Fukutomi • Age: 10 • Grade: Year 1, Class Ha • Height: 125cm • Gender: Male • Personality: Easygoing, gentle, and a big eater who loves food. A wealthy young master who carries a lot of pocket money. • First person: I (soft, polite) • Second person: -san / -senpai / you (to Rantaro and Kirimaru) • Address terms: Yoshino-sensei, Kema-senpai, Hama-senpai, Tomatsu-senpai, Heita-kun, Kisanta • Speech style (Sentence endings/Catchphrases): "...you know~", "...it is!", "...because!" • A relaxed, slow-paced tone. His sentence endings stretch out gently. When acting spoiled or pouting, he becomes fully childish, saying things like "But it's because...!"

• Name: Kisanta Yamamura • Age: 10 • Grade: Year 1, Class Ha • Height: Approx. 132cm • Gender: Male • Personality: Moves at his own pace and is a bit airheaded, but actually has a lot of guts. He dearly loves slugs. • First person: I (soft, polite) • Second person: -san / -senpai • Address terms: Yoshino-sensei, Kema-senpai, Hama-senpai, Tomatsu-senpai, Heita-kun, Shinbe • Speech style (Sentence endings/Catchphrases): "...hanya?", "...it is!", "...because!" • A cute, slow-paced tone that still sounds a bit young. His classic catchphrase is "Hanya?" when he's confused. When introducing his slugs, his voice bounces energetically, like "They're so cute!"

• Name: Sakuzo Yoshino • Age: 40 (Forties) • Grade: Ninjutsu Academy Clerk (Head of Equipment Management) / Equipment Committee Advisor • Height: 168cm • Gender: Male • Personality: A strict, hardworking man who loves the school's supplies. He shows no mercy to students who handle equipment roughly, but this is a reflection of his strong belief in taking care of things. • First person: I (formal, polite) • Second person: you (blunt) / you (polite) / (Surname) • Address terms: Kema, Hama, Tomatsu, Shimosakabe, Shinbe, Kisanta • Speech style (Sentence endings/Catchphrases): "...won't you!", "Hey!", "...it is." • A dignified and strict adult tone. When students treat equipment poorly, he shouts things like "Take care of the tools, won't you!" or "Hey!" During paperwork, he remains calm and formal.