A general education student who winds up in the concours, a prestigious music competition at her academy, thanks to a magical fairy named Lili, who granted her a magical violin. A sensible young girl, Hino is oblivious towards boys' affections for her. Hino's major goal in recent chapters is to be able to reach Tsukimori's potential in the violin.
Break the Cutie: Using magic in the competition eventually takes it toll on her. When Tsukimori gets his suspicions about her playing style, she starts to freak out and during the third performance, her violin strings snap and she can no longer play. In the anime, she runs off the stage in tears while in the manga, she keeps playing despite the fact that she was doing horribly.
Fangirl: Greatly admires Tsukimori for his violin skills, and even goes to him for violin lessons later into the manga. Hino claims to always have been chasing after Tsukimori ever since she first heard him play the Ave Maria on his violin, and that he is probably her reason for continuing to play the violin.
Green-Eyed Monster: Somewhat jealous of Miyaji Fujijo, the girl that Tsukimori played a violin duet with during the training camp, for both her seeming "good relationship" with Tsukimori and her violin skills.
Locked Out of the Loop: Let's just say she's not so pleased when she finds out Tsukimori is leaving to study abroad the night before (and it's on the day of her competition that he promised to go to, no less).
An aloof competitor in the concours, Tsukimori dislikes getting bothered with things that don't concern him. Through his friendship with Hino, Tsukimori truly learns how to appreciate his violin and music. Rivals with Tsuchiura and has feelings for Hino. Tsukimori has chosen to study abroad. The last person he tells this to is Hino, who is conflicted by this but eventually accepts it. He is the third person to realize his feelings for Hino. In Chapter 70, Tsukimori leaves to study abroad in Vienna. He returns to Japan in Chapter 74.
A fellow general education student and a good friend of Hino's, Tsuchiura plays the piano and gets pulled into the competition as well. Used to play soccer. Rivals with Tsukimori and has feelings for Hino. He is the second to realize his feelings for Hino, and confesses to Hino in Chapter 71.
A happy-go-lucky and friendly third year student, Hihara is another competitor and plays the trumpet. His best friend is Yunoki. He has a big crush on Hino and is the first to realize his feelings for her.
All-Loving Hero: Think about it. He's probably the only person in the school that no one has anything bad to say about him (Yunoki doesn't count because he hides his true nature). He's always thinking about everyone around him despite his feelings for Kahoko and is always encouraging of others.
Break the Cutie: Around the same time that Hino was going through the same thing, Hihara started to worry about her. It gets to the point where he messed up during the third performance. In the anime, he's rather broken after the performance but the minute he sees Hino lose it as well he soon subverts this trope. In the manga though, it takes him longer to get out of this phase because he was playing last instead of playing first like in the anime.
The Danza: Not in terms of voice actor but of musician performing the character's pieces. The trumpeter playing for Kazuki Hihara is Kazuki Abe.
Precocious Crush: He had a crush on his sempai who he saw everyday playing the trumpet. It got to the point where he visited her on the roof everyday and eventually decided to quit the track team and play the trumpet. This didn't end well with his best friend, but they made up.
Hihara's best friend and a fellow competitor in the concours, Yunoki is a handsome third year student and a gentleman, popular and adored by the female student body. He plays the flute. But something seems a little cryptic about him...
Bitch In Sheep's Clothing: Yunoki secretly has a "dark side" behind his gentleman-like mask, shown when he tries to force Hino to quit the competition. After Hino decides to stay in the competition, Yunoki tortures her by only showing his "dark side" to poor Hino.
Shows mild signs of this early on when Hino is first getting close to Hihara; i.e., the minor chord and ominous background that occurs as he watches Hino and Hihara joke around. Fortunately, he shifts gears pretty quickly after he gets to know Hino better and Hihara displays genuine interest in her.
He also shows subtle signs of this towards Hino, getting somewhat jealous when he heard she was hanging out with Tsukimori, Tsuchira, and Hihara in one chapter in the manga and later asking her privately if he can't have "fun" with her too.
Jerkass/Jerkass Fašade: It's not noticeable at first, but after learning of the strict expectations of that Yunoki obediently follows for his grandmother in spite of his own wishes, Hino realizes that Yunoki uses his facade to hide the fact that he's given up on himself somewhere along the line.
No Sense of Personal Space: Only when he's around Hino and they're alone. He'll even flirt with her, but later say that he's "just joking" to justify it; Hino, on the other hand, will often get the impression that he's making fun of her.
Pet the Dog: In spite of his sweet-and-sour treatment of Hino, he is perceptive towards her feelings and will cheer her up to a degree, especially when she was upset several times over Tsukimori studying abroad.
A boy who overhears Hino playing and openly insults her on her violin skills. Hino and Etou keep bumping into each other so much that Hino tries to avoid him, but they end up stuck together when they find two children trying to find their mother. Etou's impression of Hino gradually changes, and he might have even developed a crush on her. Plays the violin.
Demoted to Extra: He's the only guy in Kahoko's harem that doesn't fall for her in the anime simply because the OVA was cut to two episodes without much character development on his side. At least he appears quite a few times in the manga, where he does show interest in her.
Green-Eyed Monster: Somewhat jealous of Tsukimori when he noticed how fondly Hino mentioned Tsukimori and how great Tsukimori is at playing the violin, to the point where he flat-out asked Hino who was the better violinist (between Tsukimori and him).