"How nice it must be, for you to have music to call your own..."

Her facial expression are cold and emotionless are usual, she's fiercely outspoken by just speaking blunt or positive words out loud with confidence, yet without any ashamed. Her voice are also sounded stubborn, depression. But is this really how she behave? This isn't the mafuyu you knew a long ago.. Does this mean she's putting behind all of this underneath her facade?