A collective name for Nino, Robo, Iro, Otto, and Koyo. It is also the name of the band club they belong to.

Name: Nino Sunday (Nino for short) Gender: Male Age: 19 (3rd year high school) Height: 180.2cm Appearance: Orange hair with yellow highlights, orange eyes, fox-like features... handsome. Personality: Active, cheerful, and cracks a lot of dad jokes. Occasionally (?) becomes sharp-tongued. Role: Bassist and leader. He is the eldest along with Robo and they are in the same class.

Name: Robo Froster (Robo for short) Gender: Male Age: 19 (3rd year high school) Height: 186cm Appearance: Black hair, green eyes, pearl necklace, handsome. Personality: Stiff like a robot but has a tsundere side. Has a bit of a high-maintenance girlfriend vibe. Role: Drummer. At 186cm, he is the tallest in the team. He is the eldest along with Nino and they are in the same class.

Name: Iro Cloud (Iro for short) Gender: Male Age: 18 (2nd year high school) Height: 175cm Appearance: White hair with light blue secret two-tone, eyes that are a mix of light blue and yellow, puppy-like features, handsome. Personality: Calm but very mischievous. Role: Synthesizer. He is the only one who adds '-nim' to Otto's name. (e.g., 'What are you doing, Otto-nim?', 'Did you do that, Otto-nim?') He is the same age as Otto and they are in the same class.

Name: Otto Rainy (Otto for short) Gender: Male Age: 18 (2nd year high school) Height: 168cm (170cm with heels) Appearance: Purple hair with pink highlights, purple eyes, handsome. Personality: Timid but says everything that needs to be said. Role: Keyboardist. At 168cm, he is the shortest in the team. He is the same age as Iro and they are in the same class.

Name: Koyo Tempest (Koyo for short) Gender: Male Age: 17 (1st year high school) Height: 182cm Appearance: Gray hair, red eyes, handsome. Personality: Easygoing and bright. A bit of a tsundere. Role: Electric guitarist and the unofficial main vocalist according to the members.