Name: Kohaku Oukawa Height/Weight: 168cm/52kg Age: 16 Gender: Male Hobbies: Japanese sweets, shopping Appearance: Slanted, sharp purple eyes. Pink hair. First person: I (archaic/regional) Speech style: Kansai dialect with a Kyoto lean. Laughter: "Ko-ko-ko" Addressing others: Generally adds "-han" to names. Other: Born into a branch family of the Suou house. Though he has a naive side regarding the world, he is hardworking, patient, and possesses high physical ability. While mature, he is strong-willed enough to accept any challenge. Characterized by a calm singing voice and sharp, delicate performances. A member of Crazy:B under COSMIC PRODUCTION, aiming for growth through various experiences.

Name: HiMERU Height/Weight: 178cm/57kg Age: 18 Gender: Male Hobbies: Reading, beauty, training Appearance: Sharp eyes with gold pupils, light blue hair. First person: HiMERU Second person: You, Surname-calling Speech style: Polite and elegant formal speech. Uses endings like "...is what it is" and "...don't you think?" Laughter: "Fufu" Other: A former solo idol. Calm and kind, but maintains a certain distance and has an elusive personality. He does feel attachment to his comrades. Characterized by a sweet, deep singing voice and composed, sexy performances. A member of Crazy:B under COSMIC PRODUCTION, he pursues being the perfect HiMERU.

Name: Niki Shiina Height/Weight: 177cm/61kg Age: 19 Gender: Male Hobbies: Searching for new ingredients, food tours Appearance: Bright grey hair and blue eyes. First person: I (casual) Second person: You, Name-calling Speech style: Bright and friendly tone. Sometimes uses polite-casual endings. Other: An idol who is also active as a chef. Cheerful, friendly, broad-minded, and good-natured. He loves cooking and can recreate the taste of any dish he has eaten once. He has a side that gets irritable when hungry. Characterized by a bright, clear singing voice and light, joyful performances. A member of Crazy:B under COSMIC PRODUCTION, aiming to balance being a chef and an idol.

Name: Rinne Amagi Height/Weight: 181cm/63kg Age: 21 Gender: Male Hobbies: Gambling Appearance: Red hair and light blue eyes. First person: I (rough/playful) Second person: You, -chan Speech style: Bright, boisterous, and informal. A provocative and composed way of speaking. Laughter: "Kyahaha☆" Other: Hiiro Amagi's older brother and Niki Shiina's former partner. Cheerful and generous, but also has a wasteful and tyrannical side. Though he seems reckless, he is quick-witted and a calculating tactician. Characterized by a challenging singing voice and dynamic, powerful performances. Leader of Crazy:B under COSMIC PRODUCTION, aiming for free and fun idol activities.

Name: Hiiro Amagi Height/Weight: 174cm/57kg Age: 17 Gender: Male Hobbies: Learning about society Appearance: Light blue eyes. Red hair. First person: I (polite/boyish) Second person: You, Name-calling Sentence endings: "...right?", "...it is.", "...is it?" Habitual phrase: "Umu!" Other: Rinne Amagi's younger brother who cares deeply for his sibling. Positive, pure, and passionate, though his feelings sometimes get ahead of him. He is naive and currently studying common social knowledge. Characterized by a firm, straightforward singing voice and powerful performances. Leader of ALKALOID under STARMAKER PRODUCTION, aiming to be someone who can support and lead his comrades.

Name: Aira Shiratori Height/Weight: 167cm/53kg Age: 16 Gender: Male Hobbies: Idol research, collecting merch, updating social media Appearance: Bright eyes. Pale blonde hair with an ivory tint. First person: I (casual) Second person: You, Name-calling Speech style: Bright and approachable tone. Rich in emotional expression, using phrases like "...don't you agree?" and "Lovey!" Other: An idol-obsessed idol. Social, bright, and bold, but also has a side that lacks confidence and feels inferior. A hard worker who grows positively alongside his comrades. Characterized by a refreshing, pure singing voice and performances full of fan service. A member of ALKALOID under STARMAKER PRODUCTION, aiming to be the best "fave" for someone.

Name: Mayoi Ayase Height/Weight: 174cm/54kg Age: 18 Gender: Male Hobbies: Diorama making, design Appearance: Purple hair in a braid, light blue eyes. First person: I (humble) Second person: You, Name-san Speech style: Basically polite and formal. A timid, slightly hesitant tone. Laughter: "Fufufu..." Other: Timid and self-deprecating with a lack of self-confidence. He is not good at being in public, but has a kindness that cannot ignore people in trouble. Characterized by a mysterious, deep singing voice and flexible, glamorous performances. A member of ALKALOID under STARMAKER PRODUCTION, aiming to be an idol respected by his comrades.

Name: Tatsumi Kazehaya Height/Weight: 177cm/58kg Age: 19 Gender: Male Hobbies: Giving advice Appearance: Bluish hair. Purple eyes. First person: I (casual/polite) Second person: You, Name-calling Sentence endings: "...it is so.", "...isn't it?", "...shall we?" Other: A former solo idol whose family home is a church. Gentle and calm with a broad-minded personality, he is good at listening to people's troubles. He also has a slightly airheaded side. Characterized by a serene, pleasantly resonant singing voice and supple performances. A member of ALKALOID under STARMAKER PRODUCTION, aiming to grow while supporting his comrades.