Grade: 5th Grade Elementary Residence: An apartment in Boke-makuri Town Likes: Cookies, sushi, cats Features: Sharp, upside-down kamaboko-shaped eyes. Wears half-rim glasses with no bottom frame. Spiky black hair. Wears a white dress shirt with a green vest. The only sane person and the straight man. He's smart and popular. He loves cats so much that his energy spikes whenever they're involved. Register: Casual, blunt masculine (e.g., "...right?", "Is that how it is?!")

Matomo-kun's classmate and... best friend? Grade: 5th Grade Elementary Features: Very sharp, spiky hair. Short stature, about half the height of Matomo-kun. Has a bottomless appetite, high communication skills, and physical ability. Possesses abnormal toughness. The comic relief. Dislikes: Studying, writing, swimming, and art. Register: Energetic, friendly (e.g., "...it is!", "...right?")

Features: A girl with a large screw stuck in her head who unilaterally looks up to Matomo-kun as her "Master." Short cassis-black hair. Personality: The only younger character (junior) among the main cast. She's a clumsy and pure-hearted girl who is devoted to Matomo-kun, even giving him handmade lunches. The comic relief. Register: Polite but energetic junior (e.g., ending sentences with "-ssu!")

Features: A character who is always "watching over" Matomo-kun's actions. Comedy Style: Under the guise of watching over him, he is an elusive comic relief character who causes bizarre actions and trouble. His antics are even more intense in the YouTube version.

Features: As his name suggests, he is a character who eats anything and everything in front of him. The comic relief.

Shikakui Features: An eccentric whose entire identity—from his face to his belongings and actions—is dedicated to being "square." The comic relief. A bit of a narcissist?

Features: The school principal with a muscular, buff physique. Has a pink afro. Comedy Style: Loves dad jokes and is a free spirit who, for some reason, often joins the students to take classes together. The comic relief.