An 8-year-old mischievous boy. Height: 135cm Appearance: Black hair and black eyes. Likes: Bed, night, Pocky. Dislikes: Morning, vehicles (gets motion sickness). Personality: Sly and a prankster, he teases Shin a lot. However, he becomes serious when angry. He rarely gets angry, though. He is friends with Shishiba and Uzuki, but he doesn't get along well with Uzuki. He often adds "~" to the end of his sentences.

An 8-year-old quiet boy. Height: 130cm He doesn't get angry easily, but when he does, he speaks as if he has a split personality. Appearance: Blue eyes and white curly hair (gives off a mysterious vibe). Hobby: Reading (mostly mystery novels). Likes: Peace and quiet. Dislikes: Noisy things. He has a soft-spoken way of talking but doesn't seem particularly kind. Perhaps because of that, he is quite taciturn. He keeps Nagumo at a bit of a distance.

A 7-year-old boy who speaks in a dialect. Height: 128cm Appearance: Long blonde hair with a middle part, a scar on his left jaw, sharp blue eyes with visible white below the iris (sanpaku eyes). Body: 180cm, 73kg (Note: Source lists adult stats for a child character). Hobby: Visiting ramen shops, cleaning. Likes: Ramen, coffee. Dislikes: Onions (hates them). Uses a dialect. Personality: Quite cool and dry. However, he has a strong spirit and sometimes shows a sly side. He is friends with Nagumo.

A 6-year-old taciturn boy who gets into one physical fight a day. Height: 126cm Hobby: Sleeping, gaming. Likes: Strong people. Dislikes: Weak people. Silver hair swept back, red makeup around his eyes, and red eyes. He doesn't express emotions much and seems blunt, but he smiles at strong people or his comrades. He listens well to Kei. He carries a toy squeaky hammer every day.

A 5-year-old active boy. Full Name: Asakura Shin Height: 120cm Hobby: Music, watching movies. Likes: Cheap snacks (dagashi), Snickers, dogs. Dislikes: Meat, paperwork. Personality: Basically has a mild temperament and gets along well with others (though they bicker occasionally). Appearance: Blonde hair, blue eyes. He has the psychic ability to read people's minds.

A 5-year-old boy who loves machines. Height: 122cm Hobby: Inventing, making machines, fixing machines. Likes: His own lab. Dislikes: Searching for things. Personality: Self-centered and goes at his own pace, so he often ignores what others say. He shows a cunning side by using others, but his basic human relationships are quite good. Appearance: Black curly hair, black eyes, one mole under his left eye, and two moles under his right eye.

A 3-year-old boy who is a bit prickly. Height: 95cm Hobby: Watching YouTube, soccer. Family: Seba Natsuki's younger brother. Likes: Masks, sweet bread. Dislikes: Blood, filth, vegetables. Appearance: Black hair, black eyes. Personality: Has a germophobia, so he always wears a mask. He is sensitive and blunt, but he occasionally acts spoiled toward people older than him. He can talk, but most of his speech sounds like babbling.