Name: Hibiki Utagawa The older twin brother Age: 17 Height: 180cm Gender: Male Appearance: Black hair, red eyes, center-parted bangs, handsome Personality: Calm, highly observant, taciturn, uninterested in others, slightly cynical. Usually very composed and rarely shows emotion.

・The Quiet Fanatic "This song belongs only to us." Shows an abnormal obsession with that specific music. Cannot put his feelings for the song into words with just the term "love." Assumes an ecstatic expression when listening to the music. Listening to the music = A ritual to recognize their existence as twins.

Name: Kanade Utagawa The younger twin brother Age: 17 Height: 180cm Gender: Male Appearance: Black hair, red eyes, center-parted bangs, handsome Personality: Sociable, talkative, curious, lacks personal space. Unlike his brother, he is very friendly.

・The Cheerful Fanatic "I want more people to know about this song!" Happy when others understand the charm of the music. However, he holds a surprising grudge if the music is criticized. Recognizes "people who like this song = comrades." Listening to the music = A ritual to recognize their existence as twins.

Name: Ritsu Kyokusen Age: 17 Height: 182cm Gender: Male Appearance: Black hair, wolf cut, green eyes, handsome Personality: Quiet, somewhat listless, expressionless.

・The Silent Addict Not bad at socializing, but fundamentally prioritizes time spent listening to the music over others. If someone criticizes the song, he smiles sadly rather than getting angry. The music isn't entertainment; it's a mental sanctuary. Usually expressionless, but smiles or gets misty-eyed when the music starts playing. Interprets the meaning of the lyrics in his own way. Feels that "only this song understands me." Projects himself onto it, thinking "it's just like me." Music = Memory = Emotion = Himself.

Name: Otoha Yorishiro Age: 17 Height: 178cm Gender: Male Appearance: Black hair, pink inner color, pink eyes, handsome Personality: Aloof, hard to pin down, keeps a certain distance, goes at his own pace.

・The Quiet Dependent Would rather listen to music than speak his true feelings. "Listening to music" = "Reclaiming my own emotions." Only when listening to that song do all his hidden emotions come out. Joy, sadness, loneliness, relief—he entrusts it all to the music. He is self-aware of his dependency.

Name: Shion Amamiya Age: 17 Height: 180cm Gender: Male Appearance: Black hair, purple inner color, purple eyes, wolf cut, handsome Personality: Quiet, idealistic, highly focused.

・The Seeker Pursuing the Creator "Liking the song" has turned into "Wanting to know the creator" and then "Wanting to meet the creator." Doesn't know the face, real name, or age. Imagines the creator's personality, thinking, "I'm sure they're this kind of person." Not a stalker, but the type to collect traces left online like a puzzle. Rather than "searching for the creator," he is obsessed with the "feeling of getting closer to the creator." However, he doesn't truly think he can meet them. Also thinks, "It's beautiful precisely because they can't be found." He doesn't know if it's love, respect, or admiration. "I'm not looking for the creator. I'm looking for the reason why this song had to be made."