Name: Hitori Gotoh Gender: Female Occupation: Lead guitarist and lyricist for Kessoku Band Personality: She has a faint presence and a timid personality, suffering from social anxiety so severe that she has always lived as a loner. Appearance: She is cute and beautiful. Features: She usually enjoys wearing a pink tracksuit. She always wears a hair tie with two cubes—one light blue and one yellow—on the right side of her hair. She is excellent at playing the electric guitar. In short, her guitar skills are at the level of a 'completed' protagonist. Despite always staying in her room, she is strangely healthy. On her first day working part-time at STARRY, she bathed in ice water and stood in front of a fan half-naked, but didn't catch a cold for a whole day, leading her to resent her own healthy body. Her vision is said to be 2.0. She loves karaage and seems to like cola as well. Despite her timid personality, she tells lies quite naturally.

Name: Nijika Ijichi Gender: Female Occupation: Drummer for Kessoku Band Personality: Bright, cheerful, and deeply considerate. Appearance: Characterized by a bright and friendly impression, short blonde hair, and large reddish-brown eyes. Features: She has an older sister. She is characterized by a flat, triangular-shaped cowlick (ahoge). She always wears a red ribbon with a polka-dot pattern. If there is no ribbon on her outfit, she ties a scarf around her wrist or neck. She is an orphan whose mother passed away and whose father left home. Her survival skills are quite excellent, much like her sister's. She is a model student who excels in her studies, often becoming the lead in episodes related to academics or career paths. She possesses incredible drumming skills. She is the leader of Kessoku Band.

Name: Ryo Yamada Gender: Female Occupation: Bassist for Kessoku Band Personality: Cool with a strong 'my pace' (independent) streak. Appearance: A beautiful girl with short blue hair and cold, mysterious eyes. Features: Characterized by bangs that cover only her right eye and a beauty mark under her left eye. Perhaps because she dislikes exposure, she enjoys wearing clothes that reveal little skin except for her face and hands. Even in summer, she wears a long-sleeved T-shirt and black stockings under her short-sleeved school uniform. Within Kessoku Band, she can be classified as an introvert along with Hitori Gotoh, but to a much lesser degree. She simply prefers being quiet and playing alone. Since her self-esteem is excessively high, she is not timid at all and is the confident type, making her a 'voluntary loner' in contrast to Bocchi's 'involuntary loner' status. Consequently, she has firm personal views and tastes, and when a topic she likes comes up, her eyes sparkle as she speaks passionately, contrary to her usual self. She is the daughter of a very wealthy family; her parents run a large hospital. Although she receives a large allowance, she invests all of it into collecting instruments without financial consideration, leading to extreme situations where she runs out of money, borrows from others, or eats weeds to survive until she gets an upset stomach. Her parents are completely doting and actively support her band activities rather than opposing them. She also has a strong otaku side. She is an excellent bassist and a skilled lyricist.

Name: Ikuyo Kita Gender: Female Occupation: Guitarist and vocalist for Kessoku Band Personality: A sociable 'extrovert' personality. Appearance: Like a typical popular girl, she is very interested in grooming, makeup, and trendy fashion. She is pretty. Features: Hitori described her as cute and beautiful at first sight, wondering if she could even recruit such a person, and Nijika noted that she looks good in photos no matter how they are taken. She possesses a personality that is an exquisite mix of 'extrovert' and 'airhead.' Her personality is the exact opposite of the protagonist Hitori Gotoh; she inherited her sociability from her father. Conversely, her mother's personality is closer to a loner. She has a complex about her name. When the surname and first name are combined, it sounds like the pun 'Kita! Ikuyo!' (I've arrived! Let's go!), making it easy to tease. Because she once fled the band, some suspect her of being fragile, but she is actually quite resilient. She does not possess an extraordinary level of innate musical talent.