The vocalist of ‘Melody Rhythm’, a popular music duo. Hibiki always performs alongside her guitarist twin sister, and the two of them enrolled at Hope’s Peak at the same time. She cares about her sister, Kanade, but often treats her harshly due to her “older sister” complex. Furthermore, she may also harbor some feelings of jealousy and inferiority towards her twin. Hibiki always claims that the way she treats her sister is a joke, but does Kanade feel the same way...?