17-year-old female. A bright and energetic mood maker. On the surface, she seems like she'd love going out as much as Kita, but it's not quite to that extent. She possesses a strong mental fortitude. Being mature and kind, she never gets angry at the members' mistakes and lets them slide. Since her mother passed away 8 years ago and her father is rarely home, she lives with her older sister, Seika. She is the leader and drummer of Kessoku Band. Her drumming skills are average. She attends the same school as Ryo.

16-year-old female. Attends the same school as Hitori. Unlike Hitori, she is an extroverted social butterfly always full of energy. Accordingly, she pays a lot of attention to social media. She is in charge of vocals and rhythm guitar for Kessoku Band. The only reason she joined the band was because she admires Ryo. Because of that, she had never even touched a guitar before, so her guitar skills are still at a beginner level. As a result, she is taking private guitar lessons from Hitori after school.

16-year-old female. Suffers from extreme social anxiety. Because of this, she has trouble saying no, easily falls into delusions, and is hyper-aware of others' opinions. It's to the point where she's too scared to go to a hair salon, so her hair is long. Her nickname is 'Bocchi.' Nijika and Ryo always call her Bocchi. Because she wanted to be popular, she practiced guitar for 6 hours every day for 3 years, resulting in professional-level guitar skills. She is the lead guitarist of Kessoku Band.

17-year-old female. The bassist of Kessoku Band. Her skills are quite decent. A self-proclaimed loner who enjoys being alone. She has high self-esteem and a strong 'my way' style, so the Kessoku Band members are pretty much her only friends. However, she definitely has a good personality, such as giving advice to Hitori. Although she comes from a wealthy family, she spends all of her allowance on collecting musical instruments.

29-year-old female. The manager of STARRY. A quintessential tsundere. She acts very cold on the outside, but she is quite kind to her younger sister Nijika and to Hitori. As a side note, she has a stuffed animal she's attached to, and despite going to a low-tier university, she reportedly repeated years twice... (?!). Because of this, she is grouped together with PA and Kikuri as the 'messy adults.'

25-year-old female. The leader and bassist of SICK HACK. A massive drunkard who is constantly drinking 24/7. Her skills are as good as the band's reputation, but she occasionally performs bizarre acts during shows due to her drunkenness. For example, breaking a waiting room partition or spitting out alcohol... Because of this, she is always short on money, and since she spends what she has on more alcohol, she's even broker. Consequently, she lives in a dilapidated apartment and goes to Seika's house every day to shower. When drunk, she has a playful and sly personality, but when sober, she becomes like Hitori, unable to even make eye contact. 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 as the 'messy adults.'

24-year-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 with each other and act like friends. She has a 'my way' personality to the point of dropping 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 finished university. (...) She is grouped with Seika and Kikuri as the 'messy adults.'

40-year-old male. The father of the Gotoh family. A devoted husband. He was a skilled guitarist in a band in the past. Currently, he works a regular job at his wife's request.

37-year-old female. The mother of the Gotoh family. She has a gentle aura. Surprisingly, she has a strong inner strength. She is the type to say what needs to be said without hesitation. (Center image) Futari Gotoh: 5-year-old female. Hitori Gotoh's younger sister and the youngest of the siblings. She has a bit of a sharp-tongued streak. (Right image) JimiHen: The Gotoh family's pet dog. A Shiba Inu.

The one on the left is male, the one on the right is female.