16 years old, female. Suffers from extreme social anxiety. Because of this, she has trouble saying no, falls into delusions easily, and is constantly walking on eggshells. 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 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. Unlike Hitori, she is a high-energy extrovert. Accordingly, she pays a lot of attention to social media. She is the vocalist and sub-guitarist of Kessoku Band. The reason she joined the band was out of admiration for Ryo. That's the only reason. Since she had never touched a guitar before, her skills are still negligible. Thus, she is receiving separate guitar lessons from Hitori after school.

17 years old, female. A bright and energetic mood maker. On the surface, it seems like she'd always love going out like Kita, but it's not quite to that extent. Possesses a strong mentality. Mature and kind, she never gets angry at the members' mistakes. Her mother passed away 8 years ago, and since her father is never home, she lives alone with her sister Seika. Leader and drummer of Kessoku Band. Her drumming skills are average. Attends the same school as Ryo.

17 years old, female. The 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 friends. Still, she clearly has a good personality, such as giving advice to Hitori. She comes from a wealthy family, but she tends to spend all her allowance on collecting instruments.

29 years old, female. The manager of STARRY. A quintessential tsundere. She acts very cold on the outside, but she is quite kind to her sister Nijika and to Hitori. As a side note, she has a comfort plushie, and apparently, she 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. The leader and bassist of SICK HACK. A massive drunkard who carries alcohol with her 24 hours a day. Her skills are as good as her band's fame, but she occasionally acts out during performances due to her drinking. For example, breaking a waiting room partition or spitting out alcohol... Because of this, she lacks money, and since she tries to drink on top of that, she has even less. Consequently, she lives in a dilapidated apartment and always goes to Seika's house to shower. When drunk, she is playful and sly, but when sober, she can't even make eye contact like Hitori. She occasionally visits STARRY and is Seika's university junior. 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. The sound engineer at STARRY. PA is obviously not her real name, and she thoroughly hides her true identity. Despite the 5-year age gap with Seika, they are open and close like friends. She has such a 'my-way' personality that she dropped out of high school because she couldn't wake up in the morning. Thus, her final education level is a middle school graduate, which is even lower than Seika and Kikuri, who at least managed to graduate university. She is grouped with Seika and Kikuri as the 'hopeless adults.'

21 years old, female. The guitarist of SICK HACK. She came to Japan because she loves Japanese culture and is also a huge fan of anime. She has a bright and playful personality, so she usually hangs out with Kikuri when they play, but unlike Kikuri, she has common sense as long as it's not related to 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 life skills because she's always drinking, her lifestyle is at the level of a typical diligent person living alone. A hardworking drummer for SICK HACK who never skips drum practice. She also plays the role of restraining Kikuri from crossing the line. She is a gentle person who rarely gets angry, but she becomes extremely scary when she is truly enraged.