Megumi Yamamoto
Daughter of a famous violinist, she communicates by writing on a notepad. Megumi doesn’t like to speak because she wants to protect her voice and only use it when singing. Instead, she writes on a sketchbook to communicate. Throughout the whole course of the anime and manga, she rarely speaks.
After pretending to like Yahiro to make sure he would not disturb Akira and her new boyfriend, Tadashi, she eventually develops feelings for Yahiro, and sings to him. This is the first time that she is seen singing well. In the anime, after this, Yahiro and her begin to date, and they end up together.
In the manga, after this happens, she dates Yahiro for a while, but on New Years, when she admits her feelings for him, he turns her down. Megumi is aware that this is because he likes Akira.
Even when not dating her, Yahiro encouaged Megumi to sing, and helped her. He even tells her that he enjoys her singing. When hearing this Megumi began to cry, since simply hearing the words “I like” made her think of her feelings, and be upset. When Yahiro asked why she was crying, she tells him, and then runs away out of embarresment, afraid of his answer. Thanks to Yahiro, Megumi eventually ends up getting a singing contract, and things go well for her. Though he tells her that he does not return her feelings.
In the last chapter of the manga, he sees that Megumi was going to ask him on a date, but chickened out, and so he asked her out.