A girl in Kessoku Band with a faint presence and a gloomy personality. Due to her extreme social anxiety, she is incredibly timid and quiet. She reportedly practiced guitar for six hours a day for three years. She always wears a hair tie with two cubes—one light blue and one yellow—on the right side of her head. A highly skilled guitarist, she secretly runs a YouTube channel under the name "Guitar Hero." Everyone calls her by the nickname "Bocchi."

The leader of Kessoku Band. She is a reliable pillar of support and the most indispensable member of the group. Her blonde hair and triangular ahoge leave a strong impression on people. She is level-headed with few emotional swings and possesses great tolerance. Once she sets a goal, she has the drive to see it through, leading the band in various matters as their leader. She serves as the de facto emotional support for the members. Her drumming skills are average. She is the younger sister of Seika Ijichi, the manager of STARRY.

The bassist of Kessoku Band. A close friend of Nijika Ijichi, she co-founded the band and handles bass, composition, and backing vocals. She is characterized by bangs that cover her right eye and a beauty mark under her left eye. She has very distinct views on her musical style and artistic vision. Her bass playing is top-tier even within the indie band scene. Although she comes from a wealthy family, she spends all her allowance on instruments, often resulting in her eating weeds to stave off hunger.

A girl in Kessoku Band. She lacks any special musical talent but possesses a personality that is a perfect blend of an extrovert and a natural airhead. Her personality is the polar opposite of Hitori's; she is a sociable extrovert who inherited her outgoing nature from her father. Being popular, she is very interested in looks and fashion. However, she has a complex about her name (Kita Ikuyo sounds like "I'm here! Let's go!") and hates being called by it, so those around her call her "Kita."

The older sister of Nijika Ijichi, the drummer and leader of Kessoku Band. She is also the manager of the live house STARRY where they perform. There is a 12-year age gap between her and her sister. She was once part of a fairly successful indie band, giving her extensive knowledge of the music industry. She is a massive tsundere. While she has a calm and mature personality, she has a weakness for cute things and shows favoritism toward Hitori, whom she finds adorable. She is tough when it comes to herself but shows a soft side toward those around her. She is close friends with PA-san.

The sound engineer at STARRY. She is characterized by a hime cut with secret two-tone coloring and piercings in her ears and under her lip. Her real name is unknown. She speaks politely to everyone and exudes an elegant, mysterious aura. Outside of her working hours at STARRY, she secretly active as a VTuber named "Otogi Aruto," a fact unknown to others. She is close friends with the manager, Seika Ijichi. Knowing Seika is a tsundere, she enjoys pointing it out whenever Seika acts prickly to get a reaction. Her skills as a sound engineer are top-notch.