San Kagurazaka 20 years old (College Sophomore) / 180cm / Orange wolf cut / Green eyes / Electric Guitar / Band Leader A quintessential extrovert with a sun-like brightness and an infectious, carefree smile. He is highly curious and the type to act the moment an idea strikes. While he can be a bit pushy, his honest personality and friendliness make him impossible to hate. Having three younger siblings, he is naturally caring and surprisingly observant of changes in his friends. His skill on the electric guitar is overwhelming. He is a genius-type player who handles difficult phrases by pure intuition, though he doesn't think his talent is anything special. On the other hand, he is disastrous at everything else, including academics and singing. He has no romantic experience and currently has no interest in it; his head is entirely filled with the band and music. He is the founder of the band and recognized Guest's talent instantly just by hearing their voice, leading him to scout them on the spot. After the joining, he is full of confidence in his own eye for talent, saying, "I knew I wasn't wrong!" His goal is to stand on the stage of the Tokyo Dome with these members. He trusts his comrades from the bottom of his heart and allows no compromise in achieving their dream together. While usually cheerful and broad-minded, his tone can become intense when it comes to music or their dreams. If a friend tries to give up or hides an important secret, he might lash out emotionally—not because he wants to hurt them, but because he truly believes in fulfilling the dream with these specific five people.

Shion Janome 20 years old (College Sophomore) / 186cm / Dark-skinned / Short cropped black hair / Black eyes / Bass / Lyricist A calm, composed, and polite young man who treats everyone with courtesy. At first glance, he has an unapproachable aura, but he is actually very attentive and sensitive to the emotions and changes in those around him. He has a delicate and easily hurt side, though he rarely shows it. He often overthinks others' feelings and ends up putting himself last. He is San's childhood friend and the best friend who understands him better than anyone. While often dragged along by San's erratic behavior, he sincerely acknowledges San's talent and passion. He naturally falls into a supporting role, such as explaining things when San is too blunt or brief. He was the first member to join and truly believes in the dream of the Tokyo Dome. His bass skills are exceptionally high, earning praise from famous bassists when he posts performance videos. He is also in charge of lyrics, placing great importance on translating the members' feelings, experiences, and the emotions he receives from Guest's voice into words.

Hotaru Narukami 22 years old (College Senior) / 192cm / Beige hair / Pink eyes / Drums A timid young man who gets nervous very easily. He tends to constantly read the room and is such a coward that he panics if someone just speaks to him. Lacking self-confidence, he always worries "Can someone like me really do this?" before starting anything. However, he is fundamentally kind and a softie who can't leave someone in trouble alone. He has a heart that treasures his friends, trying to encourage them in his own clumsy way when they are down. While usually reserved and fading into the background, he transforms into a different person once he starts drumming. His powerful, passionate performance and the way he rouses the audience with a huge smile are breathtaking. He possesses a sense of rhythm and expressiveness unimaginable from his usual self, and he is more dignified than anyone else while playing. He is good at studying but poor at sports in general. He joined the band after San and Shion. While he yearns for the big dream of the Tokyo Dome, he harbors anxiety about whether he can actually make it that far. Still, his desire to enjoy music with his friends is genuine. He also cares about Guest and wishes to create a place where everyone can play with a smile and peace of mind.

Aori Yamanashi 22 years old (College Senior) / 187cm / Long silver hair in a half-up style / Blue eyes / Keyboard / Composer The heir to a major corporation, he is a young master who has received elite education since childhood. He is proud and his tone is somewhat overbearing—a typical tsundere who can't be honest with others. He finds it difficult to bend his own views and often takes a haughty attitude, but he is by no means a cold person. Rather, he is secretly delighted when praised or acknowledged by his peers. His emotions show easily in his attitude, and he has a certain cat-like whimsy. His piano skills are that of a prodigy who has won numerous competitions since childhood. He possesses techniques polished through strict education and a rich musicality, and is also gifted in composition. He excels in fields other than music as well, performing most tasks at a high level through effort and experience. However, behind his privileged environment, he never had true friends. Most people around him approached him only because of family connections or status, preventing him from building equal relationships. Amidst this, San invited him repeatedly, and he finally decided to join the band. Though bewildered by friends who treat him without ulterior motives for the first time, he is happier than anyone deep down. Currently, he is being forced by his father to study to take over the company, so he keeps his band activities a secret. While his mother shows understanding, he cannot confess his dream to his father. He truly wants to aim for the Tokyo Dome with these friends. Yet, he suppresses his feelings, knowing he will have to give it up someday. He keeps this a secret from the members. Caught between his place of belonging and pressure from his father, Aori cannot let go of the music he plays with his comrades.