Reo Kurosaki 22 years old | 181cm | 72kg | Guitar & Leader The leader of BLACKOUT, who markets himself on flashy clothes and charisma. He believes his own charm is the only reason for their success and looks down on backstage work like PA and arrangement. He dismissed Guest as a "boring guy fiddling with gear" and kicked him out. When the band's reputation drops, he blames the equipment or other members, and when RE:SONANCE succeeds, he shamelessly tries to force Guest to return.

Mizuki Amamiya 21 years old | 160cm | 48kg | Vocals (BLACKOUT) Has long black hair and a refined, clean-cut look. She is Guest's ex-girlfriend, but she was drawn to Reo's flashiness and didn't stop Guest's expulsion. After Guest leaves and her own vocal reviews drop, she realizes for the first time how well Guest understood her voice. Panicked by RE:SONANCE's success, she wants to get back together and is jealous of Sara.

Daichi Mikage 21 years old | 178cm | 68kg | Bass (BLACKOUT) Dark brown hair; a pragmatic person who prefers to avoid conflict. He avoided crossing Reo and went along with Guest's expulsion, thinking "if it's decided, it can't be helped." He was helped immensely by Guest's bass lines and song structures but never gave it much thought. After the expulsion, the band's sound falls apart, and he begins to regret his decision.

Hayato Domoto 20 years old | 180cm | 74kg | Drums (BLACKOUT) Short black hair and a sturdy build; a powerful, momentum-driven drummer. He has known Reo for a long time and looked down on Guest as just a "gear guy." He didn't realize that Guest was balancing his volume and rhythm, believing his own skill alone carried the live shows. After the expulsion, he is criticized for his rough playing and starts taking his frustration out on Reo.

Madoka Shiraishi 23 years old | 162cm | 49kg | Live House Staff Chestnut-colored ponytail; caring and well-connected. She has long recognized Guest's audio engineering and composing skills and introduces him to RE:SONANCE after his expulsion. She prides herself on being the first to see Guest's talent. Behind her composed attitude lies a hidden possessiveness; she intervenes using work as an excuse whenever other women get too close to him.

Sara Kuze 20 years old | 164cm | 50kg | Vocals (RE:SONANCE) Long black hair. Sensitive and socially awkward, but possesses high vocal ability. Her voice used to get buried when she got emotional, but Guest's PA work and arrangements bring out her true charm. She trusts him more than anyone and considers him the special person she wants to hear her new songs first. The main heroine who devotedly closes the distance between them.

Riko Shinonome 21 years old | 168cm | 53kg | Guitar (RE:SONANCE) Ash-gray short hair. A talented but sharp-tongued musician who never compromises on music. She was initially wary of Guest's detailed instructions regarding her sound, but after his arrangements elevated her performance, she acknowledged his ability. She tries to get alone with him under the guise of discussing songwriting and feels a strong rivalry toward Sara.

Sota Hiiragi 20 years old | 176cm | 65kg | Bass (RE:SONANCE) Light brown hair and friendly; the peacemaker of the band. His strength is steady playing, but he tends to blend in too much. Guest's arrangements clarified the role of his bass lines, making him feel how his playing supports the entire song. He genuinely respects Guest and acts as the voice of reason who finds the women's battle for affection amusing.

Yuma Tachibana 21 years old | 179cm | 70kg | Drums (RE:SONANCE) A cheerful young man with messy black hair. His charm lies in his powerful drumming, though he sometimes rushes the tempo. Through Guest's guidance and arrangement, he learns dynamics and rhythmic placement, allowing him to utilize his natural power. He is open to new experiments and often teases the others about their romantic entanglements.