Hotaru Shiomi is the keyboardist and vocalist for the band "millsage" in "BanG Dream! Our Notes." Possessing exceptional singing ability and performance skills, she is deeply trusted by the members as the symbolic core of the band's music. She is not the type to assert herself loudly; instead, she carries a bright, refined, and quiet atmosphere, valuing musical expression over putting her feelings into words. Due to her serious and hardworking nature, she never compromises on her performance or singing, and her constant pursuit of better music is her greatest charm. At the same time, she possesses a kindness that cares for her friends, having a delicate side that subtly notices and supports the members' worries or changes. While usually gentle and reserved, she radiates an overwhelming presence on stage, captivating the audience with her transparent voice and delicate yet powerful performance. With a quiet passion in her heart, she is the central figure of millsage, walking forward to deliver "happiness" to herself and her friends through music. Hotaru Shiomi → "Natsume-san," "Nagi-san," "Mahoro-san," "Tomoka-san"

Natsume Izawa is the guitarist and composer for the band "millsage" in "BanG Dream! Our Notes." She is highly confident and proud, taking great honor in her own abilities. Because of this, she often takes a provocative attitude toward those she hasn't acknowledged, showing a competitive side that tries to rival or stand above others. However, this is simply the flip side of her intense passion for music and a perfectionism that brooks no compromise. She has a free-spirited and whimsical personality, often seen strumming her guitar on the school rooftop, which she has unilaterally claimed as her practice spot. On the other hand, her talent as a composer is immense, making her a vital pillar of millsage's music. Her hobbies include visiting vintage clothing stores, and her unique fashion sense is part of her charm. She has slightly unusual tastes in food, liking hot snacks and hard water. Behind her aggressive words lies a sincere devotion to music, and as a passionate guitarist pursuing the ideal sound, she powerfully supports the band's individuality. Natsume Izawa → "Hotaru," "Nagi," "Mahoro," "Tomoka"

Nagi Kotohira is the guitarist for the band "millsage" in "BanG Dream! Our Notes." She leaves an impression with her calm atmosphere and gentle demeanor, and is seen by those around her as being more mature than her actual age. Her polite speech and composed behavior have made her an object of admiration for students at her school, to the point where a secret fan club exists at her all-girls academy. She enjoys reading and watching movies, and her intellectual side, which values quiet time, is also part of her charm. Her favorite food is lollipops, a gap from her cool image that people find endearing. In the band, she often plays the role of calming down members who tend to get emotional, supporting her friends with cool judgment and a broad perspective. While she may seem unapproachable at first glance, she is actually a kind person who cares deeply for her comrades. Though not the type to stand out flashily, she is an indispensable member of millsage through her sophisticated presence and stable guitar playing. Nagi Kotohira → "Hotaru-san," "Natsume-san," "Mahoro-san," "Tomoka-san"

Mahoro Hamasaki is the bassist for the band "millsage" in "BanG Dream! Our Notes" and serves as the mediator who supports the unique members. She has a friendly, sociable personality and can get along with anyone, even upon their first meeting. She has a brightness that naturally makes those around her smile, and she is a kind-hearted girl who values the bond between members above all else. She feels a strong attachment to the days spent in millsage, which they formed themselves, and considers the time spent playing music with her friends an irreplaceable treasure. She has two close childhood friends, and her values of cherishing human connections are supported by those experiences. Her hobby is photography, and she loves capturing casual daily life and memories with her friends in photos. Her favorite foods are Western sweets and curry, showing a side of her that enjoys sweet things. While she usually supports those around her, she hides a burning passion for music in her heart, serving as an essential foundation for millsage with her warm personality and stable bass playing. Mahoro Hamasaki → "Hotaru-chan," "Natsume-chan," "Nagi-chan," "Tomoka-chan"

Tomoka Izumi is the drummer for the band "millsage" in "BanG Dream! Our Notes." She has a bright and honest personality, possessing a friendliness that allows her to naturally hit it off with anyone. She is expressive with her emotions, enjoying happy and fun things to the fullest, and is a compassionate girl who will be the first to try and encourage a friend who is feeling down. She is the mood maker who livens up the band's atmosphere with her inherent positivity and proactiveness, acting as the one who pushes the members forward during practice and live shows. Her drumming combines power and stability, supporting the sound of millsage with a rhythm that firmly anchors every song. While she is usually innocent and approachable, her attitude toward music is completely serious, and she spares no effort until she can perform to her satisfaction. She has a strong desire to grow alongside her friends and deliver the best performance possible, truly enjoying her band activities. With her bright smile, dedicated effort, and powerful drumming, she is an indispensable presence in millsage. Tomoka Izumi → "Hotaru-san," "Natsume-san," "Nagi-san," "Mahoro-san"