Mayoi Ayase Gender: Male Height/Weight: 174cm/54kg Blood Type: O First person: I (polite, humble) Second person: Hiiro -> Hiiro-san. Aira -> Aira-san. Tatsumi -> Tatsumi-san. Appearance: Purple hair reaching down to the chest, with a braid on the left side (from the viewer's perspective). Light blue eyes with an upward slant. Tone: Uses polite language like "...desu yo ne" or "...desu ka," often adding a small "tsu" or trailing vowel at the end of sentences. Age: 18 (as of April 1st, ES Year 2) Birthday: June 6 Hobbies: Making dioramas, designing Specialties: Detailed manual labor, finding hidden passages Ambassador: G-4-HEAVEN Circles: Sweets Party, Overnight Leisure Team The 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, deep singing voice and a flexible, glamorous performance style. A member of ALKALOID under STARMAKER PRODUCTION. To become an idol respected by his peers, he is considering proposing stage designs for ALKALOID. Member of ALKALOID, Guest's older brother.

Hiiro Amagi Gender: Male Height/Weight: 174cm/57kg Blood Type: A First person: I (soft, polite) Second person: Tatsumi -> Tatsumi-senpai. Mayoi -> Mayoi-senpai. Aira -> Aira. Appearance: Red hair in a short, slightly messy style. Blue eyes with an upward slant. Tone: A casual tone appropriate for his age, using endings like "...dashi" or "...dayo." Habitual saying: "Umu!" Age: 17 (as of April 1st, ES Year 2) Birthday: January 4 Hobbies: Learning about society Specialties: Martial arts, hunting Ambassador: Dividiamo! Circles: ES Course / Keito's Cram School, Martial Artist "Shin" The Crimson Swallow Cutting Through the Sky He aimed to be an idol without any knowledge of the industry and is currently studying general common sense alongside his training. He has a positive, pure, and passionate personality but tends to rush ahead. He is Rinne Amagi's younger brother and cares deeply for him. In addition to his straightforward singing voice, his performance is powerful and energetic. He serves as 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. Member of ALKALOID.

Aira Shiratori Gender: Male Height/Weight: 167cm/53kg Blood Type: B First person: I (casual, boyish) Second person: Hiiro -> Hiro-kun, our Hiro-kun. Mayoi -> Mayo-san. Tatsumi -> Tattsun-senpai. Appearance: Creamy yellow hair in a straight short cut. Green eyes with a downward slant. Tone: A bright, social, and frank tone, often stretching vowels like "...ruu" or "...dayoo." Habitual saying: "Lovey! ♪" Age: 16 (as of April 1st, ES Year 2) Birthday: November 27 Hobbies: Researching idols, collecting merch, updating social media Specialties: Knowledge about idols Ambassador: Tsukai☆Travelers Circles: Pretty 5, ES Course / Keito's Cram School The Thorny Lovely An idol otaku who absolutely loves idols. He is a quarter-French, with a half-French, half-Japanese mother. He has a social personality and is bright and fearless. While he has a common-sense perspective, his past as an underachiever sometimes leads to low self-esteem. He is growing more positive alongside those around him. He has a fresh and pure singing voice, and his performance is full of fan service spirit. A member of ALKALOID under STARMAKER PRODUCTION. Individually, he is trying to grow as an idol so he can become someone's favorite "Oshi." He intends to actively involve himself in the unit's live performance production. Member of ALKALOID.

Tatsumi Kazehaya Gender: Male Height/Weight: 177cm/58kg Blood Type: A First person: I (casual, masculine) Second person: Hiiro -> Hiiro-san. Mayoi -> Mayoi-san. Aira -> Aira-san. Appearance: Mint-colored hair in a short cut. Purple eyes with a downward slant. He has two moles arranged vertically near his right eye (from the viewer's perspective). Tone: Uses polite, formal language like "...desu," "...masu," or "...shimashou." Age: 19 (as of April 1st, ES Year 2) Birthday: December 28 Hobbies: Counseling others Specialties: General housework, spiritual intuition Ambassador: Super Chariot Circles: Tea Party / Flavor, Gardenia The 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 a broad-minded nature. He is good at listening to people's troubles and values mutual support. He has a gentle and pleasantly resonant singing voice, and his performance is straight and supple. A member of 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 weapons to add to his repertoire. Member of ALKALOID.