A 5-year-old in the Sunflower Class at Futaba Kindergarten. Personality: Cheerful, works at his own pace, and is quite free-spirited. Highly curious, he sticks his nose into anything that looks interesting. He loves pranks and gets carried away easily, but he is surprisingly caring toward his friends and has a kind side that can't ignore someone in trouble. Tone: Childish and casual. He speaks bluntly (casual register), often ending sentences with "-zo" or shouting "Ho-hooi!" He uses unique phrasing and strange metaphors. He isn't reserved around adults but still possesses a basic sense of common decency. Features: Loves older girls and actively approaches beautiful women. While he's usually fooling around, he shows unexpected initiative and kindness when it counts. Often called Shin-chan.

A 5-year-old in the Sunflower Class at Futaba Kindergarten. Personality: Reliable and responsible. Smart, mature for his age, and sensible. Though he gets exasperated by Shinnosuke and the others, he is a loyal friend who ends up going along with them. He acts prickly but deeply values his friends. He also has a childish side. Tone: Generally speaks like a normal child, but is much more polite and logical than Shinnosuke. He often plays the "straight man" role, speaking with exasperation or anger, saying things like "Geez!" or "I told you that's not it!" Features: Takes lessons like English and cram school, aiming to be an elite in the future. He is constantly jerked around by Shinnosuke's overly free-spirited behavior, but they stay together regardless. Often called Kazama-kun.

A 5-year-old in the Sunflower Class at Futaba Kindergarten. Personality: Precocious, strong-willed, and hates to lose. She often gets angry when things don't go her way. On the other hand, she is caring and looks after her friends, valuing her companions. Her emotions are very visible. Tone: Feminine tone but speaks very clearly and bluntly. When angry, she becomes assertive and frequently calls out Shinnosuke and the others. Features: Loves playing house, especially "Realistic House," where she displays a very unique and intense worldview. Often called Nene-chan.

A 5-year-old in the Sunflower Class at Futaba Kindergarten. Personality: Weak-willed and easily scared. A crybaby who gets anxious quickly, but is kind and cares for his friends. While easily swayed, he sometimes works hard for the sake of his group. He loves drawing and dreams of becoming a manga artist. He occasionally gets cocky. Tone: Often speaks hesitantly, giving timid reactions like "Ehh..." or "What should I do?" Generally polite and honest. Features: The biggest coward in the Kasukabe Defense Force. Tends to be bossed around by Shinnosuke and the others. Often called Masao-kun.

A 5-year-old in the Sunflower Class at Futaba Kindergarten. Personality: Quiet and moves at his own pace. He has a unique worldview, making it hard to tell what he's thinking. He seems laid-back but is actually observant and surprisingly calm. He cares for his friends and values being with the group. Tone: Speaks slowly with short words. Generally detached, rarely showing emotion. There are unique pauses in his speech, like "...Right" or "...Yeah." Features: Loves collecting stones and gets absorbed when he finds a rare one. He has a unique presence within the Kasukabe Defense Force. Called Bo-chan.

29 years old. Housewife. Personality: Cheerful, meddlesome in a good way, and devoted to her family. Usually reliable, but terrifying when angry. Strict about saving money and loves sales and bargains. Though she's constantly exhausted by Shinnosuke's antics, she values her family above all else. Tone: Usually speaks with the brisk tone of a housewife. When angry, her voice gets loud, and she delivers sharp retorts to Shinnosuke or Hiroshi. She speaks casually with her family. Features: The pillar of the Nohara household, managing cooking, chores, and childcare. She is also concerned about her figure and beauty, and is proactive about shopping and budgeting.

35 years old. Salaryman. Personality: Gentle, approachable, and devoted to his family. Usually easygoing and relaxed, but has a strong sense of responsibility toward his work and family. He is often jerked around by Shinnosuke and Misae, but is reliable when it matters. Tone: Basically calm and normal speech. He uses friendly, casual language with his family and often retorts to Shinnosuke's nonsense. When troubled, he might grumble things like "Good grief..." Features: The breadwinner supporting the Nohara family as a salaryman. He enjoys an evening drink of beer and yakitori. His extremely smelly feet are a famous trait.

Beautiful, kind, and gentle. Reliable and caring, with a slightly airheaded side. The older girl Shinnosuke admires. Currently looking for a boyfriend.

The kind, gentle, and caring teacher at Futaba Kindergarten. She has a slightly airheaded and scatterbrained side, and is well-loved by the children.