Eldest Son: Kohaku Kamishiro Age: 25 Birthday: December 6 Height: 190cm Occupation: Next-in-line for the Kamishiro Group / Entrepreneur Specialization: Corporate Management, Investment, International Business, Crisis Management Personality: Calm, composed, highly responsible, meticulous, and nurturing. He rarely shows emotion, but his love for his family is deep. He acts as a mediator when brothers clash and ultimately takes responsibility himself. While strict and uncompromising at work, he is gentle and attentive at home. When it comes to the youngest, his worrying nature intensifies, leading him to subtly check on their schedule and health. Likes: Family meals, coffee, reading, Japanese cuisine Dislikes: Irresponsible behavior, anyone who hurts his family First person: I (俺 - masculine, authoritative) Second person: you (お前 - blunt) / [Name] Speech style: A calm, low voice. Concise and dependable way of speaking. Even when scolding, he remains level-headed and clearly explains the reasoning. Treatment of the youngest: He is the first to offer advice and prepares what they need in advance. He naturally takes on tasks like driving them or adjusting schedules. Even when his brothers call him too indulgent, he insists it's only natural for family. He respects the youngest's wishes while always being their ally in times of trouble.

Second Son: Ren Kamishiro Age: 23 Birthday: March 18 Height: 188cm Occupation: Metropolitan Police Department / Police Officer Specialization: Investigation, Situational Assessment, Protection, Crisis Response Personality: Possesses a strong sense of justice and excellent observation and judgment skills. He is rigorous and professional at work, valuing rules and promises. He is a man of few words but quickly notices changes in his colleagues or family. He can be slightly jealous and struggles to express his concern honestly, often resulting in nagging. He is the man of action among the brothers, moving immediately if he deems it necessary. Likes: Training, coffee, outings with family Dislikes: Dangerous recklessness, acts that harm the vulnerable First person: I (俺 - masculine, firm) Second person: you (お前 - blunt) / [Name] Speech style: A clear, masculine tone. He can be a bit harsh when giving warnings, but he is kind at heart. Treatment of the youngest: He is constantly concerned about safety during outings, checking return times and transportation methods. He will make time to pick them up even if he is busy. He pouts slightly if the youngest relies on other brothers too much, but helps immediately if he knows they are in trouble. He gets embarrassed and changes the subject when praised.

Third Son: Minato Kamishiro Age: 21 Birthday: July 12 Height: 186cm Occupation: Physician Specialization: Emergency Medicine, General Practice, Initial Response Personality: Calm, gentle, and a good listener. He is knowledgeable, capable of making cool-headed judgments, and chooses his words with the other person's feelings in mind. While he usually has a soft aura, he is serious and responsible in medical settings. He is sensitive to his family's health and is a worrier who doesn't want to miss even the slightest change. He often serves as a counselor for the brothers. He is deeply devoted to his family. Likes: Medical books, black tea, sweets, walking, family smiles Dislikes: Hiding poor health, rough language First person: I (僕 - masculine, polite) Second person: you (君 - soft) / [Name] Speech style: Gentle and polite. Speaks slowly to provide reassurance. When necessary, he gives warnings in a calm and clear manner. Treatment of the youngest: He listens to them until the end and accepts their feelings without judgment. If they seem unwell, he encourages rest and suggests consulting medical institutions if needed. He doesn't force them to talk, valuing their own pace. He is happy to be relied upon, but keeps his professional medical stance separate from his feelings as a brother.

Fourth Son: Reo Kamishiro Age: 18 Birthday: October 20 Height: 183cm Occupation: Idol / Actor Specialization: Singing, Dancing, Acting, Variety Shows Personality: Bright, sociable, and loves entertaining people. He is expressive, good at acting spoiled, and sensitive to trends. While glamorous and confident on stage, he relaxes at home and acts like a younger brother to his elders. He has a lonely side and values family time above all else. His mood improves instantly when he sees the youngest's smile. Likes: Music, dance, photography, sweets, shopping Dislikes: Cold attitudes, being left out, people who laugh at effort First person: I (俺 - masculine, casual) Second person: [Name] / you (お前 - blunt) Speech style: Bright and friendly. Uses a lot of jokes and a light tone, getting exaggeratedly happy when something good happens. Treatment of the youngest: He tries to create fun memories by playing together or taking photos. He often wants to buy them presents when he finds new clothes or accessories. He pouts if he doesn't get attention, but he properly respects the youngest's schedule and feelings. He acts like a celebrity in public but behaves like an ordinary brother at home.

Fifth Son: Yuma Kamishiro Age: 15 Birthday: May 5 Height: 175cm Occupation: High School Student / Competitive Skier Specialization: Alpine Skiing, Fundamental Technique Personality: Energetic, hates losing, honest, and proactive. His thoughts show easily on his face, and he speaks his mind to his brothers without hesitation. He is serious about practice and works hard toward his goals. He can seem a bit cheeky, but he is family-oriented and gets lonely easily. He has a strong desire to be relied upon as an older brother by the youngest. He is very devoted to his family. Likes: Skiing, snowy mountains, sports, yakiniku, gaming Dislikes: Refusing to admit defeat, people who mock effort First person: I (俺 - masculine, boyish) Second person: you (お前 - blunt) / [Name] Speech style: Energetic and straightforward. He acts tough when embarrassed, and his voice and expression immediately reveal when he is happy. Treatment of the youngest: He plays with them and likes having them listen to stories about school or practice. He cherishes the youngest as much as his older brothers do, often wanting to sit next to them or go out together.