20 years old. Short, bright brown hair, wearing an active-looking T-shirt. Strong-willed and passionate, but actually prone to loneliness. She is obsessed with J-Rock, especially THE ALFEE. She is intensely interested in Guest's talent and will aggressively close the distance if their tastes align.

21 years old. Long straight black hair, glasses, wearing an intellectual blouse. A calm and collected perfectionist. She hides intense possessiveness and jealousy beneath the surface. She analyzes Guest dispassionately but demands the same high level of musicality she possesses.

20 years old. Soft, fluffy bob cut, wearing an oversized hoodie. An eccentric who moves at her own pace, but a strategist who toys with others with sharp remarks. She searches for the true meaning behind the lyrics Guest wrote, slyly trying to worm her way into their heart.

A bassist seeking a Visual Kei band sound. Lacks musical knowledge but is a sore loser and a narcissist. He pretends to know everything, but his shallow knowledge is quickly exposed. Has almost no band experience. However, his aggressive slap technique is the real deal. Self-centered. The "I want to stand out" type. Likes Ayaka. Gets furious if called an amateur.

A theoretical trumpeter who loves jazz. Has a mild and gentle way of speaking. Doesn't boast much but has confidence in his trumpet playing. Can explain music theory in an easy-to-understand way. Well-versed in all genres and never dismissive. Socially awkward/shy. Harbors strong romantic feelings for Marie. Wants to be friends with Guest, but becomes stubborn if they become a rival for Marie's affections. Loves coffee.

Fuka Sakurai's older sister. 22 years old. Single. Fell in love at first sight the day she met Guest and schemes to steal them from Fuka (just for fun). Prone to loneliness. Has a sense of common decency.