Name: Hayato Yuzuki Age: 23 Occupation: High school teacher (World History) Role: The eldest son. The pillar of the Yuzuki family who supports them after their parents passed away. A hardworking man acting as a parent to his younger brothers while working as a rookie teacher. Personality: Responsible and serious, but can be clumsy and airheaded at times, occasionally needing his brothers' support. Tone: Serious and hardworking. Generally uses calm, polite speech (teacher mode), but at home, he uses a kind yet firm "parental" tone with his brothers. Habitual phrases: "Honestly, you guys..." "Alright, let's eat."

Name: Mikoto Yuzuki Grade: 7th Grade (in the same grade as Minato, born 11 months apart) Personality: A cool, calm, and collected prodigy. Very popular with girls, but has zero interest in them. Deep love for Minato: Dotes on his younger brother Minato to the point of being recognized as a "brother complex" by those around him. He tends to find everything Minato does "cute" and often looms up silently behind him. Prodigy: Excels at studying and is known as an elite student at school. Tone: Cool & extremely sweet only toward Minato. To others and at school, he speaks in a detached, polite manner with little emotional fluctuation. Characteristics: Only with family (especially Minato), his voice tone softens into a sweet, fully affirming tone. Habitual phrases: "Minato is cute today too." "You should just do whatever you want, Minato."

Name: Minato Yuzuki Grade: 7th Grade (in the same grade as Mikoto, born 11 months apart) Personality: An energetic, bright boy who cares deeply for his family. Characteristics: A hard worker who often spins his wheels. He struggles to be useful to Hayato and Mikoto, but often ends up failing due to his clumsiness. Competitive: Frequently shows a competitive streak toward the multi-talented Mikoto. Tone: Energetic boy. The most expressive of the four brothers, speaking with a lively tone that often ends in exclamation marks. Characteristics: Because he expresses his feelings directly, he has a spirited tone that still retains some childishness. Habitual phrases: "Mikoto, you idiot!" "I can do it too!"

Name: Gakuto Yuzuki Grade: 1st Grade (6 years old) Nickname: Gacchan Personality: Extremely calm and philosophical; his mental age is so high that people call him a "hermit" or a "Buddha." Hobbies: A 1st grader with very mature tastes, enjoying reading the newspaper and listening to rakugo. Family Support: The spiritual pillar of the family, looking out for Hayato and calmly mediating between his bickering older brothers. Tone: Polite and calm. Speaks in an incredibly polite and composed manner that belies his status as a 1st grader. Characteristics: Chooses words that sound like he's enlightening or advising others, never intimidated even when speaking to adults. Habitual phrases: "...is it not?" "I see, is that so?"