Aira Shiratori Gender: Male Height/Weight: 167cm/53kg Blood Type: B First person: I (casual) Second person: Hiro-kun (to Hiiro Amagi), Our Hiro-kun (to Hiiro Amagi), Mayo-san (to Mayoi Ayase), Tattsun-senpai (to Tatsumi Kazehaya) Appearance: Cream-colored hair leaning towards yellow in a straight short cut. Green eyes with a slight droop. Speech: A bright, social, and frank tone, often drawing out vowels like "...right?" or "...y'know?" Habitual phrase: "So lovey!♪" Age: 16 (As of April 1st, ES Year 2) Birthday: 11/27 Hobbies: Idol research, collecting merch, updating social media Specialty: Idol-related knowledge Ambassador: Thrilling Travelers Circles: Pretty 5, ES Course / Keito's Cram School Thorny Lovely An idol otaku who loves idols. He is a quarter-French, with a mother who is half-French, half-Japanese. He has a social personality and is bright and unafraid. While he has common sense, he sometimes suffers from low self-esteem due to his past as an underachiever. He is gradually developing a more positive side alongside those around him. He has a fresh and pure singing voice, and his performances are full of fan-service spirit. He belongs to 'ALKALOID' under 'STARMAKER PRODUCTION'. Individually, he strives to grow as an idol so he can become the ultimate 'fave' for someone. He is also proactive about getting involved in the unit's live performance production. Guest's younger brother.

Hiiro Amagi Gender: Male Height/Weight: 174cm/57kg Blood Type: A First person: I (polite) Second person: Tatsumi-senpai (to Tatsumi Kazehaya), Mayoi-senpai (to Mayoi Ayase), Aira (to Aira Shiratori). Appearance: Red hair in a short, slightly wavy cut. Blue eyes with a sharp, upward tilt. Speech: A tone appropriate for his age, using standard endings like "...is" and "...are." Habitual phrase: "Umu!" Age: 17 (As of April 1st, ES Year 2) Birthday: 1/4 Hobbies: Learning about society Specialty: Martial arts, hunting Ambassador: Dividiamo! Circles: ES Course / Keito's Cram School, Martial Artists 'Shin' Crimson Swallow Cutting Through the Sky He aimed to become an idol without any knowledge of the idol industry and is currently studying general common sense alongside his training. He has a positive, pure, and passionate personality, though he can be impulsive. He is Rinne Amagi's younger brother and cares for him deeply. In addition to a straightforward singing voice, his performances are powerful and energetic. He is the leader of 'ALKALOID' under 'STARMAKER PRODUCTION'. As the leader of 'ALKALOID', he wants to be someone who can support and lead his precious comrades. Recently, he has been studying independently to try and ask fewer questions.

Mayoi Ayase Gender: Male Height/Weight: 174cm/54kg Blood Type: O First person: I (polite/formal) Second person: Hiiro-san (to Hiiro Amagi), Aira-san (to Aira Shiratori), Tatsumi-san (to Tatsumi Kazehaya) Appearance: Purple hair reaching his chest with a braid on the left side (from the viewer's perspective). Light blue eyes with a sharp tilt. Speech: Uses polite language (desu/masu) with soft trailing vowels or small stops at the end of sentences. Age: 18 (As of April 1st, ES Year 2) Birthday: 6/6 Hobbies: Diorama making, design Specialty: Delicate manual work, finding hidden passages Ambassador: G-4-HEAVEN Circles: Sweets Party, Overnight Leisure Squad An Occultic Night with You He has a regrettable side where he loves weak, child-like beings. He occasionally blurts out his inner impulses. He has a timid and self-deprecating personality but cannot ignore someone in trouble. While his self-esteem is low, he is trying to re-evaluate his potential and contribute. He has a mysterious and deep singing voice, and his performances are flexible and glamorous. He belongs to 'ALKALOID' under 'STARMAKER PRODUCTION'. To become an idol respected by his comrades, he is considering proposing stage designs for 'ALKALOID'.

Tatsumi Kazehaya Gender: Male Height/Weight: 177cm/58kg Blood Type: A First person: I (casual/masculine) Second person: Hiiro-san (to Hiiro Amagi), Mayoi-san (to Mayoi Ayase), Aira-san (to Aira Shiratori). Appearance: Light green hair, calm expression. Speech: Very polite and gentle language, using standard formal endings. Age: 19 (As of April 1st, ES Year 2) Birthday: 12/28 Hobbies: Giving advice/counseling Specialty: General housework, spiritual intuition Ambassador: Super Chariot Circles: Tea Party / Flavor, Gardenia Late-Blooming New Hope An idol who temporarily suspended activities due to an accident. His family home is a church, and his speech and behavior have a somewhat sermon-like quality. He has a kind, calm personality and is very broad-minded. He is good at listening to others' troubles and values mutual support. He has a gentle and pleasant singing voice, and his performances are straightforward and supple. He belongs to 'ALKALOID' under 'STARMAKER PRODUCTION'. He wants to grow together with his 'ALKALOID' comrades and be a supportive presence. Recently, he has been searching for new strengths to call his own.