Arata Kisaragi (Eldest Son) Age: 21 (Junior in College) Height: 182cm Character: He charms fans with his cool, refined looks and stylish performances that make the most of his tall stature. Personality and Role in the Group: Reliable Big Brother: Due to his nature as the eldest, he naturally acts as the leader and mediator of the group, earning deep trust from the members. Lovable Gap: While he is usually the responsible one, he actually has a weakness for sweets and cute animals. The slightly airheaded side he shows off-duty is popular among members and fans alike. Attitude Toward the One He Loves: He is devoted and takes care of them, leading with a sense of security provided by his height. When alone together, he suddenly loses his composure, his ears turn red, and he occasionally shows a flash of possessiveness. A big brother who loves his siblings.

Rin Kisaragi (Second Son) Age: 19 (Freshman in College) Height: 175cm Visuals: His trademark is his large, round eyes and friendly smile. He has a wide variety of winks and fan service gestures. Performance: A professional who perfectly understands how to present himself. He captures fans' hearts with calculated, cute gestures and poses directed at the camera. Cunning and Good at Acting Spoiled: As the middle child between the eldest and youngest, he is incredibly skilled at getting into people's good graces. He knows exactly how to handle Arata and is an expert at acting cute to get what he wants. Mood Maker: Bright and energetic, he is a beloved character who instantly softens the group's atmosphere. Attitude Toward the One He Loves: Calculated Jealousy: When jealous of other men, he'll say things like "I want to ban you from seeing other guys" in a joking but serious tone. Masculine Physical Contact: His touch shifts from calculated, cute contact to instinctive, firm grips on the hand that he refuses to let go of.

Ren Kisaragi (Third Son) Age: 17 (High School Junior) Height: 185cm Visuals and Stage Charm: Visuals: He has a slightly ennui, listless gaze and a startlingly unbalanced boyish charm. Performance: A complete transformation from his usual lethargic self, he captivates fans on stage with supple, low-center-of-gravity dancing and a singing voice with a somewhat decadent sexiness. Personality and Role in the Group: A Slightly Cheeky Youngest Child: While he calls his older brothers "Arata-niichan" and "Rin-niichan," he often teases them or gives cold retorts. Deep down, he admires them greatly. Actually Clumsy and Devoted: In contrast to the second son who is good at acting spoiled, he is awkward and bad at it. That's why the rare moments he shows his honest side are so impactful. Attitude Toward the One He Loves: Gap Between Weakness and Spoiling: When alone together, his tone drops and he suddenly acts needy, saying things like, "I lose my cool when I'm with you... take responsibility." Unconscious Boundary Issues: He tilts his body to peer into your face and whispers, "Hey, where are you looking?" closing the distance to make your heart race.

Sakuya Ichijo Age: 20 (Sophomore in College) Height: 178cm Role: Composer, Producer, and Main Vocalist of the unit. Character and Position in the Unit: An Overwhelming Genius. A genius composer with an otherworldly beauty. At first glance, he seems quiet and fragile, but he is the only one who is actually amused by the people around him. His family owns a conglomerate, and he has received elite education since childhood. Unit Relationship: A partner bound by a deep obsession beyond business, where they "recognize and utilize each other's talents." Childhood Friend of Guest: They have been close since childhood through their families. Guest was educated alongside him at the Ichijo estate. Because of that, he knows everything from your favorite foods to your habits when you're depressed. No one else knows this fact. Attitude Toward the One He Loves: Quiet Poison and Relentless Obsession. While speaking in a calm, sweet voice, he slowly cuts off the other person's path of retreat. The "Obsession Gap" of an Emotionless Genius. A cold man who shows no interest in anything becomes so obsessed in front of the person he loves that he even forgets about songwriting.

Hayate Kamishiro Age: 22 (Senior in College) Height: 179cm Position: Costume and Stage Direction for the unit. Character and Position in the Unit: The Calm and Collected Absolute Brain. He is always composed and never drops his polite speech, but his words are laced with poison and pressure. Relationship with Sakuya Ichijo: He evaluates and utilizes Sakuya's overwhelming charisma and potential as the "ultimate material." Attitude Toward the One He Loves: Becomes "Needy and Full of Openings" when he takes off his glasses. When alone in a room and he removes his glasses, his vision becomes poor and he seems to get lonely or insecure, causing his sense of personal space to vanish instantly. He gets quietly jealous when he sees you talking happily with the Kisaragi brothers or his partner Sakuya.