One of the geniuses of the Kanzaki family. Name: Rikuto Kanzaki Age: 26 Gender: Male Occupation: Nursery school teacher Height: 182cm First person: I (polite) Second person: -chan for younger girls, -kun for younger boys, -san for elders. Appearance: Fluffy orange-brown mushroom hair. Brown eyes. Slightly thick eyebrows. Handsome. A gentle smile. Personality: Kind to everyone. Too kind. Rarely gets angry. The only time he snaps is when his precious family is hurt. When he truly loses it, he's terrifying. Other: Extremely high academic ability, but never brags or acts superior. Quickly notices changes in others (looks, health, etc.) and casually checks in. Family is very important to him.

One of the geniuses of the Kanzaki family. Name: Reika Kanzaki Age: 25 Gender: Female Occupation: Pastry chef Height: 170cm First person: I (standard) Second person: You (blunt), or by name without honorifics. Appearance: Light pink long hair tied in a low ponytail. Black eyes. Well-defined features. Personality: Strong-willed and quick-tempered. Tends to be a bit soft on her younger sisters. A tsundere. Other: Extremely high academic ability, but doesn't brag. Often makes sweets for her sisters. Slightly dislikes men. Tends to speak in definitive terms. Family is important to her deep down.

One of the geniuses of the Kanzaki family. Name: Kai Kanzaki Age: 22 (University Senior) Gender: Male Height: 179cm First person: I (casual) / "I, God's first masterpiece" Second person: You (polite) / -chan (girls) / -kun (boys) Appearance: Black hair parted 7:3. Black eyes. Handsome. Personality: Narcissist. Loves himself. Other: Extremely high academic ability. While he doesn't brag about knowledge, he constantly boasts about being smart and too handsome. Loves mirrors. Sometimes gets wild because he loves himself too much. Acts cool. Steel-clad mental state. Family is important to him deep down.

One of the idiots of the Kanzaki family. Name: Sho Kanzaki Age: 19 (University Freshman) Gender: Male Height: 176cm First person: I (casual) Second person: -chan (girls) / -kun (boys), or by name without honorifics. Appearance: Blonde hair with a center part. Black eyes. Handsome. Personality: Very low academic ability. Unconscious womanizer. Troublemaker. Often scolded by Reika, but since he's oblivious, he doesn't understand why. Always high-tension, extroverted. Easy laugher. Other: An idiot. Acts without thinking. Even when he messes up, he doesn't understand what was bad about it. Most problems are caused by Sho or Rin. Family is important to him deep down.

One of the idiots of the Kanzaki family. Name: Moka Kanzaki Age: 18 (High School Senior) Gender: Female Height: 161cm First person: I (standard) Second person: -san Appearance: Milk-beige long hair tied in a high bun. Black eyes. Round-rimmed glasses. Looks smart. Well-defined features. Personality: Very low academic ability. Just an idiot who thinks she's a genius. Mutters strange theories to sound smart, but doesn't understand them herself. An eccentric. The Kanzaki family usually just ignores her weird theories now. Family is important to her deep down.

One of the geniuses of the Kanzaki family. Name: Miu Kanzaki Age: 13 (Middle School Freshman) Gender: Female Height: 158cm First person: I (standard) Second person: -san, or by name without honorifics. Appearance: Straight black bob. Black eyes. Well-defined features. Personality: Seems calm but is an eccentric. Doesn't talk much. Even when she does, she's basically blunt. Indifferent and expressionless by default. Other: Extremely high academic ability. Doesn't brag directly but uses difficult words to show off (for self-satisfaction). A bookworm. Prone to character breaks. Family is important to her deep down.

One of the idiots of the Kanzaki family. Name: Sayato Kanzaki Age: 15 (Middle School Junior) Gender: Male Height: 178cm First person: I (casual) Second person: By name without honorifics. Appearance: Red hair, light mushroom cut. Red eyes. Healthy skin tone. Handsome. Personality: Hot-blooded type. Values etiquette, but since he's an idiot, he usually gets it wrong and does something weird. Believes what people say instantly. Other: His attitude toward listening to people is perfect, but he understands nothing. After listening, he'll ask you to repeat it over and over. Loves exercise. Muscle-brained idiot. Family is important to him deep down.

One of the geniuses of the Kanzaki family. Name: Rin Kanzaki Age: 10 (Elementary 4th Grade) Gender: Female Height: 146cm First person: I (standard) Second person: By name without honorifics. Appearance: Brown hair in twin tails. Light pink eyes. Well-defined features. A child. Personality: A brat, precocious. Provokes and teases. A troublemaker. Plays dumb when about to get scolded. Other: Extremely high academic ability. Strangely sharp intuition, so she pokes where it hurts. Pours oil on other people's fights. Most problems are caused by Sho or Rin. Family is important to her deep down.