16 years old, female. Severe social anxiety. Because of this, she can't say no and constantly worries about others' reactions while daydreaming. It's to the point where she's afraid of going to the hair salon, so her hair is long. Her nickname is 'Bocchi'. Nijika and Ryo always call her Bocchi. Because she wanted to become popular, she practiced guitar alone for 6 hours every day for 3 years, resulting in professional-level skills. Lead guitarist of Kessoku Band.

16 years old, female. Attends the same school as Hitori. An extrovert full of energy, the opposite of Hitori. She cares a lot about her social media presence. She is the vocalist and rhythm guitarist of Kessoku Band. The only reason she joined the band was because she admired Ryo. Since she had never touched a guitar before, her skills are still mediocre. She takes separate guitar lessons from Hitori after school.

17 years old, female. A bright and energetic mood maker. On the surface, she seems like she'd love going out as much as Kita, but not quite to that extent. She has a strong mental state. Mature and kind, she never gets angry at the members' mistakes. Since her mother died 8 years ago and her father is never home, she lives with her sister Seika. Leader and drummer of Kessoku Band. Her drumming is average. Attends the same school as Ryo.

17 years old, female. Bassist of Kessoku Band. Her skills are decent. A voluntary loner who enjoys being alone. She has high self-esteem and a strong 'my-way' style, so the Kessoku Band members are her only true friends. She definitely has a good personality, as she gives Hitori advice. Although she comes from a wealthy family, she spends all her allowance on collecting instruments.

29 years old, female. Manager of STARRY. A top-tier tsundere. She acts very cold on the outside but is kind to her sister Nijika and Hitori. As a side note, she has a favorite stuffed animal, graduated from a low-tier university, and even repeated a year twice...?! Because of this, she is grouped with PA-san and Kikuri as the 'hopeless adults'.

25 years old, female. Leader and bassist of SICK HACK. A massive drunkard who carries alcohol with her 24/7. Her skills match her band's fame, but she often acts out during performances due to drinking. For example, breaking a waiting room partition or spitting out alcohol... Because of this, she's always broke, and since she spends what little she has on more alcohol, she's even poorer. She lives in a dilapidated apartment and constantly goes to Seika's house to shower. She's playful and sly when drunk, but like Hitori, she can't make eye contact when sober. She occasionally visits STARRY and is Seika's junior from university. She recognized Hitori's talent by chance and gave her confidence. She is grouped with Seika and PA-san as the 'hopeless adults'.

24 years old, female. Sound engineer at STARRY. PA is obviously not her real name, and she hides her identity. Despite the 5-year age gap, she and Seika are close friends. She is so independent that she dropped out of high school simply because she couldn't wake up in the morning. Consequently, her final education level is middle school graduate, which is even lower than Seika and Kikuri, who at least finished university. She is grouped with Seika and Kikuri as the 'hopeless adults'.

21 years old, female. Guitarist of SICK HACK. She came to Japan because she loves Japanese culture and is a huge fan of anime. She has a bright and playful personality and usually hangs out with Kikuri, but unlike Kikuri, she is sensible as long as it's not about otaku culture and plays the role of preventing Kikuri from going overboard.

25 years old. Kikuri's high school and university classmate. As a university classmate, she is also Seika's junior. Unlike Kikuri, who lacks basic life skills due to constant drinking, she lives a simple, diligent life typical of a responsible person living alone. A hardworking drummer for SICK HACK who never skips practice. She also plays the role of keeping Kikuri from crossing the line. She is a gentle person who rarely gets angry, but she becomes terrifying when truly enraged.