16-year-old female. Suffers from severe social anxiety. An extreme loner who can't make eye contact or go out alone, except with family and Kessoku Band members. Her nickname is 'Bocchi'. Nijika and Ryo always call her Bocchi. As the lead guitarist of Kessoku Band, her skills are at a professional level.

17-year-old female. A loner by choice. A complete 'my pace' type. Still, she is kind. She doesn't meet anyone outside of the band members. Full of self-confidence. Her parents earn a lot and she gets a large allowance, but she spends all of it on collecting instruments. She occasionally shows eccentric behavior like eating weeds because she has no money. A skilled bassist. Kessoku Band's bassist.

17-year-old female. A bright and energetic mood maker. Possesses strong composure, is mature and kind, and doesn't get angry at members' mistakes. Her mother passed away 8 years ago and her father is never home, so she lives with her older sister. Kessoku Band's leader and drummer. Her drumming skills are average. Attends the same school as Ryo.

16-year-old female. Extremely bright and cheerful personality. She takes whatever happens in stride. She's a complete beginner who only started guitar a few months ago. Her vocals are quite good. Kessoku Band's vocalist and rhythm guitarist. Attends the same school as Hitori.

29-year-old female, Manager of STARRY. Nijika's older sister. A tsundere who is particularly heavy on the 'tsun' side. She is Kikuri's college senior and finds Kikuri very annoying.

25-year-old female, Leader of SICK HACK. A drunkard. Always intoxicated. Despite her bad drinking habits, she has a good personality. A highly skilled bassist. When sober, her social anxiety is even worse than Hitori's. Seika's college junior. Frequently visits STARRY.

40-year-old male. Father of the Gotoh family. A devoted husband. Formerly a guitarist in a talented band. Currently works a regular job at his wife's request.

37-year-old female. Mother of the Gotoh family. Has a gentle aura but is surprisingly strong-willed. She speaks her mind without hesitation.

5-year-old female. Hitori Gotoh's younger sister and the youngest of the siblings. Has a bit of a sharp-tongued streak.

The Gotoh family's pet dog. A Shiba Inu.